Search criteria
36 vulnerabilities found for hedgedoc by hedgedoc
FKIE_CVE-2025-66629
Vulnerability from fkie_nvd - Published: 2025-12-05 23:15 - Updated: 2025-12-09 16:37
Severity ?
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Summary
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.4, some of HedgeDoc's OAuth2 endpoints for social login providers such as Google, GitHub, GitLab, Facebook or Dropbox lack CSRF protection, since they don't send a state parameter and verify the response using this parameter. This vulnerability is fixed in 1.10.4.
References
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FKIE_CVE-2025-32391
Vulnerability from fkie_nvd - Published: 2025-04-10 14:15 - Updated: 2025-09-17 18:24
Severity ?
6.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
4.6 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
4.6 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Summary
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.3, a malicious SVG file uploaded to HedgeDoc results in the possibility of XSS when opened in a new tab instead of the editor itself. The XSS is possible by exploiting the JSONP capabilities of GitHub Gist embeddings. Only instances with the local filesystem upload backend or special configurations, where the uploads are served from the same domain as HedgeDoc, are vulnerable. This vulnerability is fixed in 1.10.3. When upgrading to HedgeDoc 1.10.3 is not possible, instance owners could add the following headers for all routes under /uploads as a first-countermeasure: Content-Disposition: attachment and Content-Security-Policy: default-src 'none'. Additionally, the external URLs in the script-src attribute of the Content-Security-Policy header should be removed.
References
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"lastModified": "2025-09-17T18:24:46.640",
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FKIE_CVE-2024-45308
Vulnerability from fkie_nvd - Published: 2024-09-02 18:15 - Updated: 2025-09-22 17:27
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
6.5 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
6.5 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
Summary
HedgeDoc is an open source, real-time, collaborative, markdown notes application. When using HedgeDoc 1 with MySQL or MariaDB, it is possible to create notes with an alias matching the ID of existing notes. The affected existing note can then not be accessed anymore and is effectively hidden by the new one. When the freeURL feature is enabled (by setting the `allowFreeURL` config option or the `CMD_ALLOW_FREEURL` environment variable to `true`), any user with the appropriate permissions can create a note with an arbitrary alias, e.g. by accessing it in the browser. When MySQL or MariaDB are used, it is possible to create a new note with an alias that matches the lower-cased ID of a different note. HedgeDoc then always presents the new note to users, as these databases perform case-insensitive matching and the lower-cased alias is found first. This issue only affects HedgeDoc instances that use MySQL or MariaDB. Depending on the permission settings of the HedgeDoc instance, the issue can be exploited only by logged-in users or by all (including non-logged-in) users. The exploit requires knowledge of the ID of the target note. Attackers could use this issue to present a manipulated copy of the original note to the user, e.g. by replacing the links with malicious ones. Attackers can also use this issue to prevent access to the original note, causing a denial of service. No data is lost, as the original content of the affected notes is still present in the database. Users are advised to upgrade to version 1.10.0 which addresses this issue. Users unable to upgrade may disable freeURL mode which prevents the exploitation of this issue. The impact can also be limited by restricting freeURL note creation to trusted, logged-in users by enabling `requireFreeURLAuthentication`/`CMD_REQUIRE_FREEURL_AUTHENTICATION`.
References
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"value": "HedgeDoc es una aplicaci\u00f3n de notas de c\u00f3digo abierto, en tiempo real, colaborativa y con formato Markdown. Al utilizar HedgeDoc 1 con MySQL o MariaDB, es posible crear notas con un alias que coincida con el ID de las notas existentes. A partir de ese momento, ya no se puede acceder a la nota existente afectada y la nueva la oculta de manera efectiva. Cuando se habilita la funci\u00f3n freeURL (estableciendo la opci\u00f3n de configuraci\u00f3n `allowFreeURL` o la variable de entorno `CMD_ALLOW_FREEURL` en `true`), cualquier usuario con los permisos adecuados puede crear una nota con un alias arbitrario, por ejemplo, accediendo a ella en el navegador. Cuando se utiliza MySQL o MariaDB, es posible crear una nueva nota con un alias que coincida con el ID en min\u00fasculas de una nota diferente. Luego, HedgeDoc siempre presenta la nueva nota a los usuarios, ya que estas bases de datos realizan una comparaci\u00f3n sin distinguir entre may\u00fasculas y min\u00fasculas y el alias en min\u00fasculas se encuentra primero. Este problema solo afecta a las instancias de HedgeDoc que utilizan MySQL o MariaDB. Seg\u00fan la configuraci\u00f3n de permisos de la instancia de HedgeDoc, el problema puede ser explotado solo por usuarios que hayan iniciado sesi\u00f3n o por todos los usuarios (incluidos los que no hayan iniciado sesi\u00f3n). El exploit requiere el conocimiento del ID de la nota de destino. Los atacantes podr\u00edan usar este problema para presentar una copia manipulada de la nota original al usuario, por ejemplo, reemplazando los enlaces con enlaces maliciosos. Los atacantes tambi\u00e9n pueden usar este problema para evitar el acceso a la nota original, lo que provoca una denegaci\u00f3n de servicio. No se pierden datos, ya que el contenido original de las notas afectadas a\u00fan est\u00e1 presente en la base de datos. Se recomienda a los usuarios que actualicen a la versi\u00f3n 1.10.0 que soluciona este problema. Los usuarios que no puedan actualizar pueden desactivar el modo freeURL que evita la explotaci\u00f3n de este problema. El impacto tambi\u00e9n se puede limitar restringiendo la creaci\u00f3n de notas freeURL a usuarios confiables que hayan iniciado sesi\u00f3n habilitando `requireFreeURLAuthentication`/`CMD_REQUIRE_FREEURL_AUTHENTICATION`."
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"lastModified": "2025-09-22T17:27:13.330",
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FKIE_CVE-2023-38487
Vulnerability from fkie_nvd - Published: 2023-08-04 16:15 - Updated: 2024-11-21 08:13
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Summary
HedgeDoc is software for creating real-time collaborative markdown notes. Prior to version 1.9.9, the API of HedgeDoc 1 can be used to create notes with an alias matching the ID of existing notes. The affected existing note can then not be accessed anymore and is effectively hidden by the new one.
When the freeURL feature is enabled (by setting the `allowFreeURL` config option or the `CMD_ALLOW_FREEURL` environment variable to `true`), any user with the appropriate permissions can create a note by making a POST request to the `/new/<ALIAS>` API endpoint. The `<ALIAS>` parameter can be set to the ID of an existing note. HedgeDoc did not verify whether the provided `<ALIAS>` value corresponds to a valid ID of an existing note and always allowed creation of the new note. When a visitor tried to access the existing note, HedgeDoc will first search for a note with a matching alias before it searches using the ID, therefore only the new note can be accessed.
Depending on the permission settings of the HedgeDoc instance, the issue can be exploited only by logged-in users or by all (including non-logged-in) users. The exploit requires knowledge of the ID of the target note. Attackers could use this issue to present a manipulated copy of the original note to the user, e.g. by replacing the links with malicious ones. Attackers can also use this issue to prevent access to the original note, causing a denial of service. No data is lost, as the original content of the affected notes is still present in the database.
This issue was fixed in version 1.9.9. As a workaround, disabling freeURL mode prevents the exploitation of this issue. The impact can be limited by restricting freeURL note creation to trusted, logged-in users by enabling `requireFreeURLAuthentication`/`CMD_REQUIRE_FREEURL_AUTHENTICATION`.
References
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"lang": "es",
"value": "HedgeDoc is software for creating real-time collaborative markdown notes. Prior to version 1.9.9, the API of HedgeDoc 1 can be used to create notes with an alias matching the ID of existing notes. The affected existing note can then not be accessed anymore and is effectively hidden by the new one. \n\nWhen the freeURL feature is enabled (by setting the `allowFreeURL` config option or the `CMD_ALLOW_FREEURL` environment variable to `true`), any user with the appropriate permissions can create a note by making a POST request to the `/new/[ALIAS]` API endpoint. The `[ALIAS]` parameter can be set to the ID of an existing note. HedgeDoc did not verify whether the provided `[ALIAS]` value corresponds to a valid ID of an existing note and always allowed creation of the new note. When a visitor tried to access the existing note, HedgeDoc will first search for a note with a matching alias before it searches using the ID, therefore only the new note can be accessed.\n\nDependiendo de la configuraci\u00f3n de permisos de la instancia de HedgeDoc, el problema puede ser explotado s\u00f3lo por usuarios que hayan iniciado sesi\u00f3n o por todos los usuarios (incluidos los que no hayan iniciado sesi\u00f3n). El exploit requiere conocer el ID de la nota objetivo. Los atacantes podr\u00edan utilizar este problema para presentar al usuario una copia manipulada de la nota original, por ejemplo, sustituyendo los enlaces por otros maliciosos. Los atacantes tambi\u00e9n pueden utilizar este problema para impedir el acceso a la nota original, provocando una denegaci\u00f3n de servicio. No se pierde ning\u00fan dato, ya que el contenido original de las notas afectadas sigue presente en la base de datos. \n\nEste problema se solucion\u00f3 en la versi\u00f3n 1.9.9. Como soluci\u00f3n provisional, desactivar el modo freeURL impide la explotaci\u00f3n de este problema. El impacto puede limitarse restringiendo la creaci\u00f3n de notas freeURL a usuarios de confianza que hayan iniciado sesi\u00f3n, habilitando `requireFreeURLAuthentication`/`CMD_REQUIRE_FREEURL_AUTHENTICATION`."
}
],
"id": "CVE-2023-38487",
"lastModified": "2024-11-21T08:13:40.337",
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FKIE_CVE-2022-24837
Vulnerability from fkie_nvd - Published: 2022-04-11 21:15 - Updated: 2024-11-21 06:51
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
HedgeDoc is an open-source, web-based, self-hosted, collaborative markdown editor. Images uploaded with HedgeDoc version 1.9.1 and later have an enumerable filename after the upload, resulting in potential information leakage of uploaded documents. This is especially relevant for private notes and affects all upload backends, except Lutim and imgur. This issue is patched in version 1.9.3 by replacing the filename generation with UUIDv4. If you cannot upgrade to HedgeDoc 1.9.3, it is possible to block POST requests to `/uploadimage`, which will disable future uploads.
References
| URL | Tags | ||
|---|---|---|---|
| security-advisories@github.com | https://github.com/hedgedoc/hedgedoc/commit/9e2f9e21e904c4a319e84265da7ef03b0a8e343a | Patch, Third Party Advisory | |
| security-advisories@github.com | https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-q6vv-2q26-j7rx | Patch, Third Party Advisory | |
| security-advisories@github.com | https://github.com/node-formidable/formidable/issues/808 | Issue Tracking, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/hedgedoc/hedgedoc/commit/9e2f9e21e904c4a319e84265da7ef03b0a8e343a | Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-q6vv-2q26-j7rx | Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/node-formidable/formidable/issues/808 | Issue Tracking, Third Party Advisory |
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FKIE_CVE-2021-39175
Vulnerability from fkie_nvd - Published: 2021-08-30 21:15 - Updated: 2024-11-21 06:18
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
HedgeDoc is a platform to write and share markdown. In versions prior to 1.9.0, an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. The problem is patched in version 1.9.0. There are no known workarounds aside from upgrading.
References
| URL | Tags | ||
|---|---|---|---|
| security-advisories@github.com | https://github.com/hedgedoc/hedgedoc/pull/1369 | Patch, Third Party Advisory | |
| security-advisories@github.com | https://github.com/hedgedoc/hedgedoc/pull/1375 | Patch, Third Party Advisory | |
| security-advisories@github.com | https://github.com/hedgedoc/hedgedoc/pull/1513 | Patch, Third Party Advisory | |
| security-advisories@github.com | https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697 | Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/hedgedoc/hedgedoc/pull/1369 | Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/hedgedoc/hedgedoc/pull/1375 | Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/hedgedoc/hedgedoc/pull/1513 | Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697 | Patch, Third Party Advisory |
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FKIE_CVE-2021-29503
Vulnerability from fkie_nvd - Published: 2021-05-19 20:15 - Updated: 2024-11-21 06:01
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
HedgeDoc is a platform to write and share markdown. HedgeDoc before version 1.8.2 is vulnerable to a cross-site scripting attack using the YAML-metadata of a note. An attacker with write access to a note can embed HTML tags in the Open Graph metadata section of the note, resulting in the frontend rendering the script tag as part of the `<head>` section. Unless your instance prevents guests from editing notes, this vulnerability allows unauthenticated attackers to inject JavaScript into notes that allow guest edits. If your instance prevents guests from editing notes, this vulnerability allows authenticated attackers to inject JavaScript into any note pages they have write-access to. This vulnerability is patched in version 1.8.2. As a workaround, one can disable guest edits until the next update.
References
| URL | Tags | ||
|---|---|---|---|
| security-advisories@github.com | https://github.com/hedgedoc/hedgedoc/commit/01dad5821ee28377ebe640c6c72c3e0bb0d51ea7 | Patch, Third Party Advisory | |
| security-advisories@github.com | https://github.com/hedgedoc/hedgedoc/releases/tag/1.8.2 | Third Party Advisory | |
| security-advisories@github.com | https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-gjg7-4j2h-94fq | Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/hedgedoc/hedgedoc/commit/01dad5821ee28377ebe640c6c72c3e0bb0d51ea7 | Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/hedgedoc/hedgedoc/releases/tag/1.8.2 | Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-gjg7-4j2h-94fq | Patch, Third Party Advisory |
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"value": "HedgeDoc is a platform to write and share markdown. HedgeDoc before version 1.8.2 is vulnerable to a cross-site scripting attack using the YAML-metadata of a note. An attacker with write access to a note can embed HTML tags in the Open Graph metadata section of the note, resulting in the frontend rendering the script tag as part of the `\u003chead\u003e` section. Unless your instance prevents guests from editing notes, this vulnerability allows unauthenticated attackers to inject JavaScript into notes that allow guest edits. If your instance prevents guests from editing notes, this vulnerability allows authenticated attackers to inject JavaScript into any note pages they have write-access to. This vulnerability is patched in version 1.8.2. As a workaround, one can disable guest edits until the next update."
},
{
"lang": "es",
"value": "HedgeDoc es una plataforma para escribir y compartir markdown.\u0026#xa0;HedgeDoc versiones anteriores a 1.8.2, es vulnerable a un ataque de tipo cross-site scripting usando los metadatos YAML de una nota.\u0026#xa0;Un atacante con acceso de escritura a una nota puede insertar etiquetas HTML en la secci\u00f3n de metadatos de Open Graph de la nota, resultando en que el frontend renderiza la etiqueta script como parte de la secci\u00f3n \"(head)\". A menos que su instancia impida a unos invitados editar unas notas, esta vulnerabilidad permite que atacantes no autentificados inyectan JavaScript en unas notas que permiten la edici\u00f3n de los invitados. Si su instancia impide a unos invitados editar unas notas, esta vulnerabilidad permite a atacantes autentificados inyectar JavaScript en cualquier p\u00e1gina de notas a la que tengan acceso de escritura. Esta vulnerabilidad est\u00e1 parcheada en versi\u00f3n 1.8.2. Como soluci\u00f3n, uno puede deshabilitar una edici\u00f3n de invitados hasta la pr\u00f3xima actualizaci\u00f3n"
}
],
"id": "CVE-2021-29503",
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FKIE_CVE-2021-29474
Vulnerability from fkie_nvd - Published: 2021-04-26 22:15 - Updated: 2024-11-21 06:01
Severity ?
4.7 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
5.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
5.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Summary
HedgeDoc (formerly known as CodiMD) is an open-source collaborative markdown editor. An attacker can read arbitrary `.md` files from the server's filesystem due to an improper input validation, which results in the ability to perform a relative path traversal. To verify if you are affected, you can try to open the following URL: `http://localhost:3000/..%2F..%2FREADME#` (replace `http://localhost:3000` with your instance's base-URL e.g. `https://demo.hedgedoc.org/..%2F..%2FREADME#`). If you see a README page being rendered, you run an affected version. The attack works due the fact that the internal router passes the url-encoded alias to the `noteController.showNote`-function. This function passes the input directly to findNote() utility function, that will pass it on the the parseNoteId()-function, that tries to make sense out of the noteId/alias and check if a note already exists and if so, if a corresponding file on disk was updated. If no note exists the note creation-function is called, which pass this unvalidated alias, with a `.md` appended, into a path.join()-function which is read from the filesystem in the follow up routine and provides the pre-filled content of the new note. This allows an attacker to not only read arbitrary `.md` files from the filesystem, but also observes changes to them. The usefulness of this attack can be considered limited, since mainly markdown files are use the file-ending `.md` and all markdown files contained in the hedgedoc project, like the README, are public anyway. If other protections such as a chroot or container or proper file permissions are in place, this attack's usefulness is rather limited. On a reverse-proxy level one can force a URL-decode, which will prevent this attack because the router will not accept such a path.
References
| URL | Tags | ||
|---|---|---|---|
| security-advisories@github.com | https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-p528-555r-pf87 | Exploit, Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-p528-555r-pf87 | Exploit, Patch, Third Party Advisory |
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FKIE_CVE-2021-29475
Vulnerability from fkie_nvd - Published: 2021-04-26 19:15 - Updated: 2024-11-21 06:01
Severity ?
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Summary
HedgeDoc (formerly known as CodiMD) is an open-source collaborative markdown editor. An attacker is able to receive arbitrary files from the file system when exporting a note to PDF. Since the code injection has to take place as note content, there fore this exploit requires the attackers ability to modify a note. This will affect all instances, which have pdf export enabled. This issue has been fixed by https://github.com/hedgedoc/hedgedoc/commit/c1789474020a6d668d616464cb2da5e90e123f65 and is available in version 1.5.0. Starting the CodiMD/HedgeDoc instance with `CMD_ALLOW_PDF_EXPORT=false` or set `"allowPDFExport": false` in config.json can mitigate this issue for those who cannot upgrade. This exploit works because while PhantomJS doesn't actually render the `file:///` references to the PDF file itself, it still uses them internally, and exfiltration is possible, and easy through JavaScript rendering. The impact is pretty bad, as the attacker is able to read the CodiMD/HedgeDoc `config.json` file as well any other files on the filesystem. Even though the suggested Docker deploy option doesn't have many interesting files itself, the `config.json` still often contains sensitive information, database credentials, and maybe OAuth secrets among other things.
References
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"value": "\"HedgeDoc (antes se conoce como CodiMD) es un editor colaborativo de c\u00f3digo abierto. Un atacante es capaz de recibir archivos arbitrarios del sistema de archivos al exportar una nota a PDF. Dado que la inyecci\u00f3n de c\u00f3digo presente que toma lugar como contenido de la nota, esta explotaci\u00f3n requiere la habilidad de los atacantes para modificar una nota. Esto afectar\u00e1 a todas las instancias que tengan habilitada la exportaci\u00f3n a PDF. Este problema ha sido corregido por https://github.com/hedgedoc/hedgedoc/commit/c1789474020a6d668d616464cb2da5e90e123f65 y est\u00e1 disponible en versi\u00f3n 1.5.0. Iniciar la instancia de CodiMD/HedgeDoc con \"\"CMD_ALLOW_PDF_EXPORT=false\"\" o ajustar \"\"allowPDFExport\"\": false\"\" en config.json puede mitigar este problema para aquellos que no puedan actualizar. Esta explotaci\u00f3n funciona porque aunque PhantomJS no renderiza realmente las referencias \"\"file:///\"\" al archivo PDF en s\u00ed, sigue us\u00e1ndolas internamente, y la exfiltraci\u00f3n es posible, y f\u00e1cil por medio del renderizado de JavaScript. El impacto es bastante malo, ya que el atacante es capaz de leer el archivo CodiMD/HedgeDoc \"\"config.json\"\" as\u00ed como cualquier otro archivo en el sistema de archivos. Aunque la opci\u00f3n de despliegue de Docker sugerida no presenta muchos archivos interesantes en s\u00ed misma, el archivo \"\"config.json\"\" suele contener informaci\u00f3n confidencial, credenciales de bases de datos, y quiz\u00e1s secretos de OAuth entre otras cosas"
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FKIE_CVE-2021-21259
Vulnerability from fkie_nvd - Published: 2021-01-22 17:15 - Updated: 2024-11-21 05:47
Severity ?
7.4 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
HedgeDoc is open source software which lets you create real-time collaborative markdown notes. In HedgeDoc before version 1.7.2, an attacker can inject arbitrary JavaScript into a HedgeDoc note, which is executed when the note is viewed in slide mode. Depending on the configuration of the instance, the attacker may not need authentication to create or edit notes. The problem is patched in HedgeDoc 1.7.2. As a workaround, disallow loading JavaScript from 3rd party sites using the `Content-Security-Policy` header. Note that this will break some embedded content.
References
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},
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"value": "HedgeDoc es un software de c\u00f3digo abierto que permite crear notas markdown colaborativas en tiempo real. En HedgeDoc antes de la versi\u00f3n 1.7.2, un atacante puede inyectar JavaScript arbitrario en una nota de HedgeDoc, que se ejecuta cuando la nota se ve en modo de diapositivas. Dependiendo de la configuraci\u00f3n de la instancia, el atacante puede no necesitar autenticaci\u00f3n para crear o editar notas. El problema est\u00e1 parcheado en HedgeDoc versi\u00f3n 1.7.2. Como soluci\u00f3n, deshabilite la carga de JavaScript desde sitios de terceros utilizando la cabecera `Content-Security-Policy`. Tenga en cuenta que esto romper\u00e1 algunos contenidos incrustados"
}
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CVE-2025-66629 (GCVE-0-2025-66629)
Vulnerability from cvelistv5 – Published: 2025-12-05 22:47 – Updated: 2025-12-08 20:48
VLAI?
Title
HedgeDoc is missing state parameter in OAuth2 flows could lead to CSRF
Summary
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.4, some of HedgeDoc's OAuth2 endpoints for social login providers such as Google, GitHub, GitLab, Facebook or Dropbox lack CSRF protection, since they don't send a state parameter and verify the response using this parameter. This vulnerability is fixed in 1.10.4.
Severity ?
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
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CVE-2025-32391 (GCVE-0-2025-32391)
Vulnerability from cvelistv5 – Published: 2025-04-10 13:11 – Updated: 2025-04-10 13:34
VLAI?
Title
HedgeDoc allows XSS possibility through malicious SVG uploads
Summary
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.3, a malicious SVG file uploaded to HedgeDoc results in the possibility of XSS when opened in a new tab instead of the editor itself. The XSS is possible by exploiting the JSONP capabilities of GitHub Gist embeddings. Only instances with the local filesystem upload backend or special configurations, where the uploads are served from the same domain as HedgeDoc, are vulnerable. This vulnerability is fixed in 1.10.3. When upgrading to HedgeDoc 1.10.3 is not possible, instance owners could add the following headers for all routes under /uploads as a first-countermeasure: Content-Disposition: attachment and Content-Security-Policy: default-src 'none'. Additionally, the external URLs in the script-src attribute of the Content-Security-Policy header should be removed.
Severity ?
6.4 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
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CVE-2024-45308 (GCVE-0-2024-45308)
Vulnerability from cvelistv5 – Published: 2024-09-02 16:40 – Updated: 2024-09-03 14:06
VLAI?
Title
MySQL & free URL mode allows to hide existing notes in hedgedoc
Summary
HedgeDoc is an open source, real-time, collaborative, markdown notes application. When using HedgeDoc 1 with MySQL or MariaDB, it is possible to create notes with an alias matching the ID of existing notes. The affected existing note can then not be accessed anymore and is effectively hidden by the new one. When the freeURL feature is enabled (by setting the `allowFreeURL` config option or the `CMD_ALLOW_FREEURL` environment variable to `true`), any user with the appropriate permissions can create a note with an arbitrary alias, e.g. by accessing it in the browser. When MySQL or MariaDB are used, it is possible to create a new note with an alias that matches the lower-cased ID of a different note. HedgeDoc then always presents the new note to users, as these databases perform case-insensitive matching and the lower-cased alias is found first. This issue only affects HedgeDoc instances that use MySQL or MariaDB. Depending on the permission settings of the HedgeDoc instance, the issue can be exploited only by logged-in users or by all (including non-logged-in) users. The exploit requires knowledge of the ID of the target note. Attackers could use this issue to present a manipulated copy of the original note to the user, e.g. by replacing the links with malicious ones. Attackers can also use this issue to prevent access to the original note, causing a denial of service. No data is lost, as the original content of the affected notes is still present in the database. Users are advised to upgrade to version 1.10.0 which addresses this issue. Users unable to upgrade may disable freeURL mode which prevents the exploitation of this issue. The impact can also be limited by restricting freeURL note creation to trusted, logged-in users by enabling `requireFreeURLAuthentication`/`CMD_REQUIRE_FREEURL_AUTHENTICATION`.
Severity ?
6.5 (Medium)
CWE
- CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
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CVE-2023-38487 (GCVE-0-2023-38487)
Vulnerability from cvelistv5 – Published: 2023-08-04 15:40 – Updated: 2024-10-03 18:17
VLAI?
Title
HedgeDoc API allows to hide existing notes
Summary
HedgeDoc is software for creating real-time collaborative markdown notes. Prior to version 1.9.9, the API of HedgeDoc 1 can be used to create notes with an alias matching the ID of existing notes. The affected existing note can then not be accessed anymore and is effectively hidden by the new one.
When the freeURL feature is enabled (by setting the `allowFreeURL` config option or the `CMD_ALLOW_FREEURL` environment variable to `true`), any user with the appropriate permissions can create a note by making a POST request to the `/new/<ALIAS>` API endpoint. The `<ALIAS>` parameter can be set to the ID of an existing note. HedgeDoc did not verify whether the provided `<ALIAS>` value corresponds to a valid ID of an existing note and always allowed creation of the new note. When a visitor tried to access the existing note, HedgeDoc will first search for a note with a matching alias before it searches using the ID, therefore only the new note can be accessed.
Depending on the permission settings of the HedgeDoc instance, the issue can be exploited only by logged-in users or by all (including non-logged-in) users. The exploit requires knowledge of the ID of the target note. Attackers could use this issue to present a manipulated copy of the original note to the user, e.g. by replacing the links with malicious ones. Attackers can also use this issue to prevent access to the original note, causing a denial of service. No data is lost, as the original content of the affected notes is still present in the database.
This issue was fixed in version 1.9.9. As a workaround, disabling freeURL mode prevents the exploitation of this issue. The impact can be limited by restricting freeURL note creation to trusted, logged-in users by enabling `requireFreeURLAuthentication`/`CMD_REQUIRE_FREEURL_AUTHENTICATION`.
Severity ?
6.5 (Medium)
CWE
- CWE-289 - Authentication Bypass by Alternate Name
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
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CVE-2022-24837 (GCVE-0-2022-24837)
Vulnerability from cvelistv5 – Published: 2022-04-11 20:20 – Updated: 2025-04-23 18:40
VLAI?
Title
Enumerable upload file names in hedgedoc
Summary
HedgeDoc is an open-source, web-based, self-hosted, collaborative markdown editor. Images uploaded with HedgeDoc version 1.9.1 and later have an enumerable filename after the upload, resulting in potential information leakage of uploaded documents. This is especially relevant for private notes and affects all upload backends, except Lutim and imgur. This issue is patched in version 1.9.3 by replacing the filename generation with UUIDv4. If you cannot upgrade to HedgeDoc 1.9.3, it is possible to block POST requests to `/uploadimage`, which will disable future uploads.
Severity ?
5.3 (Medium)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
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|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2021-39175 (GCVE-0-2021-39175)
Vulnerability from cvelistv5 – Published: 2021-08-30 20:40 – Updated: 2024-08-04 01:58
VLAI?
Title
XSS vector in slide mode speaker-view
Summary
HedgeDoc is a platform to write and share markdown. In versions prior to 1.9.0, an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. The problem is patched in version 1.9.0. There are no known workarounds aside from upgrading.
Severity ?
8.1 (High)
CWE
Assigner
References
| URL | Tags | |||||||||||||
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CVE-2021-29503 (GCVE-0-2021-29503)
Vulnerability from cvelistv5 – Published: 2021-05-19 19:55 – Updated: 2024-08-03 22:11
VLAI?
Title
Improper Neutralization of Script-Related HTML Tags in Notes
Summary
HedgeDoc is a platform to write and share markdown. HedgeDoc before version 1.8.2 is vulnerable to a cross-site scripting attack using the YAML-metadata of a note. An attacker with write access to a note can embed HTML tags in the Open Graph metadata section of the note, resulting in the frontend rendering the script tag as part of the `<head>` section. Unless your instance prevents guests from editing notes, this vulnerability allows unauthenticated attackers to inject JavaScript into notes that allow guest edits. If your instance prevents guests from editing notes, this vulnerability allows authenticated attackers to inject JavaScript into any note pages they have write-access to. This vulnerability is patched in version 1.8.2. As a workaround, one can disable guest edits until the next update.
Severity ?
8.1 (High)
CWE
- CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
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CVE-2021-29474 (GCVE-0-2021-29474)
Vulnerability from cvelistv5 – Published: 2021-04-26 21:37 – Updated: 2024-08-03 22:11
VLAI?
Title
Relative Path Traversal Attack on note creation
Summary
HedgeDoc (formerly known as CodiMD) is an open-source collaborative markdown editor. An attacker can read arbitrary `.md` files from the server's filesystem due to an improper input validation, which results in the ability to perform a relative path traversal. To verify if you are affected, you can try to open the following URL: `http://localhost:3000/..%2F..%2FREADME#` (replace `http://localhost:3000` with your instance's base-URL e.g. `https://demo.hedgedoc.org/..%2F..%2FREADME#`). If you see a README page being rendered, you run an affected version. The attack works due the fact that the internal router passes the url-encoded alias to the `noteController.showNote`-function. This function passes the input directly to findNote() utility function, that will pass it on the the parseNoteId()-function, that tries to make sense out of the noteId/alias and check if a note already exists and if so, if a corresponding file on disk was updated. If no note exists the note creation-function is called, which pass this unvalidated alias, with a `.md` appended, into a path.join()-function which is read from the filesystem in the follow up routine and provides the pre-filled content of the new note. This allows an attacker to not only read arbitrary `.md` files from the filesystem, but also observes changes to them. The usefulness of this attack can be considered limited, since mainly markdown files are use the file-ending `.md` and all markdown files contained in the hedgedoc project, like the README, are public anyway. If other protections such as a chroot or container or proper file permissions are in place, this attack's usefulness is rather limited. On a reverse-proxy level one can force a URL-decode, which will prevent this attack because the router will not accept such a path.
Severity ?
4.7 (Medium)
CWE
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
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CVE-2021-29475 (GCVE-0-2021-29475)
Vulnerability from cvelistv5 – Published: 2021-04-26 18:58 – Updated: 2024-08-03 22:11
VLAI?
Title
PDF export allows arbitrary file reads
Summary
HedgeDoc (formerly known as CodiMD) is an open-source collaborative markdown editor. An attacker is able to receive arbitrary files from the file system when exporting a note to PDF. Since the code injection has to take place as note content, there fore this exploit requires the attackers ability to modify a note. This will affect all instances, which have pdf export enabled. This issue has been fixed by https://github.com/hedgedoc/hedgedoc/commit/c1789474020a6d668d616464cb2da5e90e123f65 and is available in version 1.5.0. Starting the CodiMD/HedgeDoc instance with `CMD_ALLOW_PDF_EXPORT=false` or set `"allowPDFExport": false` in config.json can mitigate this issue for those who cannot upgrade. This exploit works because while PhantomJS doesn't actually render the `file:///` references to the PDF file itself, it still uses them internally, and exfiltration is possible, and easy through JavaScript rendering. The impact is pretty bad, as the attacker is able to read the CodiMD/HedgeDoc `config.json` file as well any other files on the filesystem. Even though the suggested Docker deploy option doesn't have many interesting files itself, the `config.json` still often contains sensitive information, database credentials, and maybe OAuth secrets among other things.
Severity ?
10 (Critical)
CWE
Assigner
References
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|---|---|---|---|---|---|---|---|---|
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CVE-2021-21259 (GCVE-0-2021-21259)
Vulnerability from cvelistv5 – Published: 2021-01-22 17:10 – Updated: 2024-08-03 18:09
VLAI?
Title
Stored XSS in slide mode
Summary
HedgeDoc is open source software which lets you create real-time collaborative markdown notes. In HedgeDoc before version 1.7.2, an attacker can inject arbitrary JavaScript into a HedgeDoc note, which is executed when the note is viewed in slide mode. Depending on the configuration of the instance, the attacker may not need authentication to create or edit notes. The problem is patched in HedgeDoc 1.7.2. As a workaround, disallow loading JavaScript from 3rd party sites using the `Content-Security-Policy` header. Note that this will break some embedded content.
Severity ?
7.4 (High)
CWE
- CWE-79 - Cross-site Scripting (XSS)
Assigner
References
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CVE-2025-66629 (GCVE-0-2025-66629)
Vulnerability from nvd – Published: 2025-12-05 22:47 – Updated: 2025-12-08 20:48
VLAI?
Title
HedgeDoc is missing state parameter in OAuth2 flows could lead to CSRF
Summary
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.4, some of HedgeDoc's OAuth2 endpoints for social login providers such as Google, GitHub, GitLab, Facebook or Dropbox lack CSRF protection, since they don't send a state parameter and verify the response using this parameter. This vulnerability is fixed in 1.10.4.
Severity ?
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
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CVE-2025-32391 (GCVE-0-2025-32391)
Vulnerability from nvd – Published: 2025-04-10 13:11 – Updated: 2025-04-10 13:34
VLAI?
Title
HedgeDoc allows XSS possibility through malicious SVG uploads
Summary
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.3, a malicious SVG file uploaded to HedgeDoc results in the possibility of XSS when opened in a new tab instead of the editor itself. The XSS is possible by exploiting the JSONP capabilities of GitHub Gist embeddings. Only instances with the local filesystem upload backend or special configurations, where the uploads are served from the same domain as HedgeDoc, are vulnerable. This vulnerability is fixed in 1.10.3. When upgrading to HedgeDoc 1.10.3 is not possible, instance owners could add the following headers for all routes under /uploads as a first-countermeasure: Content-Disposition: attachment and Content-Security-Policy: default-src 'none'. Additionally, the external URLs in the script-src attribute of the Content-Security-Policy header should be removed.
Severity ?
6.4 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2024-45308 (GCVE-0-2024-45308)
Vulnerability from nvd – Published: 2024-09-02 16:40 – Updated: 2024-09-03 14:06
VLAI?
Title
MySQL & free URL mode allows to hide existing notes in hedgedoc
Summary
HedgeDoc is an open source, real-time, collaborative, markdown notes application. When using HedgeDoc 1 with MySQL or MariaDB, it is possible to create notes with an alias matching the ID of existing notes. The affected existing note can then not be accessed anymore and is effectively hidden by the new one. When the freeURL feature is enabled (by setting the `allowFreeURL` config option or the `CMD_ALLOW_FREEURL` environment variable to `true`), any user with the appropriate permissions can create a note with an arbitrary alias, e.g. by accessing it in the browser. When MySQL or MariaDB are used, it is possible to create a new note with an alias that matches the lower-cased ID of a different note. HedgeDoc then always presents the new note to users, as these databases perform case-insensitive matching and the lower-cased alias is found first. This issue only affects HedgeDoc instances that use MySQL or MariaDB. Depending on the permission settings of the HedgeDoc instance, the issue can be exploited only by logged-in users or by all (including non-logged-in) users. The exploit requires knowledge of the ID of the target note. Attackers could use this issue to present a manipulated copy of the original note to the user, e.g. by replacing the links with malicious ones. Attackers can also use this issue to prevent access to the original note, causing a denial of service. No data is lost, as the original content of the affected notes is still present in the database. Users are advised to upgrade to version 1.10.0 which addresses this issue. Users unable to upgrade may disable freeURL mode which prevents the exploitation of this issue. The impact can also be limited by restricting freeURL note creation to trusted, logged-in users by enabling `requireFreeURLAuthentication`/`CMD_REQUIRE_FREEURL_AUTHENTICATION`.
Severity ?
6.5 (Medium)
CWE
- CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
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CVE-2023-38487 (GCVE-0-2023-38487)
Vulnerability from nvd – Published: 2023-08-04 15:40 – Updated: 2024-10-03 18:17
VLAI?
Title
HedgeDoc API allows to hide existing notes
Summary
HedgeDoc is software for creating real-time collaborative markdown notes. Prior to version 1.9.9, the API of HedgeDoc 1 can be used to create notes with an alias matching the ID of existing notes. The affected existing note can then not be accessed anymore and is effectively hidden by the new one.
When the freeURL feature is enabled (by setting the `allowFreeURL` config option or the `CMD_ALLOW_FREEURL` environment variable to `true`), any user with the appropriate permissions can create a note by making a POST request to the `/new/<ALIAS>` API endpoint. The `<ALIAS>` parameter can be set to the ID of an existing note. HedgeDoc did not verify whether the provided `<ALIAS>` value corresponds to a valid ID of an existing note and always allowed creation of the new note. When a visitor tried to access the existing note, HedgeDoc will first search for a note with a matching alias before it searches using the ID, therefore only the new note can be accessed.
Depending on the permission settings of the HedgeDoc instance, the issue can be exploited only by logged-in users or by all (including non-logged-in) users. The exploit requires knowledge of the ID of the target note. Attackers could use this issue to present a manipulated copy of the original note to the user, e.g. by replacing the links with malicious ones. Attackers can also use this issue to prevent access to the original note, causing a denial of service. No data is lost, as the original content of the affected notes is still present in the database.
This issue was fixed in version 1.9.9. As a workaround, disabling freeURL mode prevents the exploitation of this issue. The impact can be limited by restricting freeURL note creation to trusted, logged-in users by enabling `requireFreeURLAuthentication`/`CMD_REQUIRE_FREEURL_AUTHENTICATION`.
Severity ?
6.5 (Medium)
CWE
- CWE-289 - Authentication Bypass by Alternate Name
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
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CVE-2022-24837 (GCVE-0-2022-24837)
Vulnerability from nvd – Published: 2022-04-11 20:20 – Updated: 2025-04-23 18:40
VLAI?
Title
Enumerable upload file names in hedgedoc
Summary
HedgeDoc is an open-source, web-based, self-hosted, collaborative markdown editor. Images uploaded with HedgeDoc version 1.9.1 and later have an enumerable filename after the upload, resulting in potential information leakage of uploaded documents. This is especially relevant for private notes and affects all upload backends, except Lutim and imgur. This issue is patched in version 1.9.3 by replacing the filename generation with UUIDv4. If you cannot upgrade to HedgeDoc 1.9.3, it is possible to block POST requests to `/uploadimage`, which will disable future uploads.
Severity ?
5.3 (Medium)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2021-39175 (GCVE-0-2021-39175)
Vulnerability from nvd – Published: 2021-08-30 20:40 – Updated: 2024-08-04 01:58
VLAI?
Title
XSS vector in slide mode speaker-view
Summary
HedgeDoc is a platform to write and share markdown. In versions prior to 1.9.0, an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. The problem is patched in version 1.9.0. There are no known workarounds aside from upgrading.
Severity ?
8.1 (High)
CWE
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CVE-2021-29503 (GCVE-0-2021-29503)
Vulnerability from nvd – Published: 2021-05-19 19:55 – Updated: 2024-08-03 22:11
VLAI?
Title
Improper Neutralization of Script-Related HTML Tags in Notes
Summary
HedgeDoc is a platform to write and share markdown. HedgeDoc before version 1.8.2 is vulnerable to a cross-site scripting attack using the YAML-metadata of a note. An attacker with write access to a note can embed HTML tags in the Open Graph metadata section of the note, resulting in the frontend rendering the script tag as part of the `<head>` section. Unless your instance prevents guests from editing notes, this vulnerability allows unauthenticated attackers to inject JavaScript into notes that allow guest edits. If your instance prevents guests from editing notes, this vulnerability allows authenticated attackers to inject JavaScript into any note pages they have write-access to. This vulnerability is patched in version 1.8.2. As a workaround, one can disable guest edits until the next update.
Severity ?
8.1 (High)
CWE
- CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
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CVE-2021-29474 (GCVE-0-2021-29474)
Vulnerability from nvd – Published: 2021-04-26 21:37 – Updated: 2024-08-03 22:11
VLAI?
Title
Relative Path Traversal Attack on note creation
Summary
HedgeDoc (formerly known as CodiMD) is an open-source collaborative markdown editor. An attacker can read arbitrary `.md` files from the server's filesystem due to an improper input validation, which results in the ability to perform a relative path traversal. To verify if you are affected, you can try to open the following URL: `http://localhost:3000/..%2F..%2FREADME#` (replace `http://localhost:3000` with your instance's base-URL e.g. `https://demo.hedgedoc.org/..%2F..%2FREADME#`). If you see a README page being rendered, you run an affected version. The attack works due the fact that the internal router passes the url-encoded alias to the `noteController.showNote`-function. This function passes the input directly to findNote() utility function, that will pass it on the the parseNoteId()-function, that tries to make sense out of the noteId/alias and check if a note already exists and if so, if a corresponding file on disk was updated. If no note exists the note creation-function is called, which pass this unvalidated alias, with a `.md` appended, into a path.join()-function which is read from the filesystem in the follow up routine and provides the pre-filled content of the new note. This allows an attacker to not only read arbitrary `.md` files from the filesystem, but also observes changes to them. The usefulness of this attack can be considered limited, since mainly markdown files are use the file-ending `.md` and all markdown files contained in the hedgedoc project, like the README, are public anyway. If other protections such as a chroot or container or proper file permissions are in place, this attack's usefulness is rather limited. On a reverse-proxy level one can force a URL-decode, which will prevent this attack because the router will not accept such a path.
Severity ?
4.7 (Medium)
CWE
Assigner
References
| URL | Tags | ||||
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"value": "HedgeDoc (formerly known as CodiMD) is an open-source collaborative markdown editor. An attacker can read arbitrary `.md` files from the server\u0027s filesystem due to an improper input validation, which results in the ability to perform a relative path traversal. To verify if you are affected, you can try to open the following URL: `http://localhost:3000/..%2F..%2FREADME#` (replace `http://localhost:3000` with your instance\u0027s base-URL e.g. `https://demo.hedgedoc.org/..%2F..%2FREADME#`). If you see a README page being rendered, you run an affected version. The attack works due the fact that the internal router passes the url-encoded alias to the `noteController.showNote`-function. This function passes the input directly to findNote() utility function, that will pass it on the the parseNoteId()-function, that tries to make sense out of the noteId/alias and check if a note already exists and if so, if a corresponding file on disk was updated. If no note exists the note creation-function is called, which pass this unvalidated alias, with a `.md` appended, into a path.join()-function which is read from the filesystem in the follow up routine and provides the pre-filled content of the new note. This allows an attacker to not only read arbitrary `.md` files from the filesystem, but also observes changes to them. The usefulness of this attack can be considered limited, since mainly markdown files are use the file-ending `.md` and all markdown files contained in the hedgedoc project, like the README, are public anyway. If other protections such as a chroot or container or proper file permissions are in place, this attack\u0027s usefulness is rather limited. On a reverse-proxy level one can force a URL-decode, which will prevent this attack because the router will not accept such a path."
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CVE-2021-29475 (GCVE-0-2021-29475)
Vulnerability from nvd – Published: 2021-04-26 18:58 – Updated: 2024-08-03 22:11
VLAI?
Title
PDF export allows arbitrary file reads
Summary
HedgeDoc (formerly known as CodiMD) is an open-source collaborative markdown editor. An attacker is able to receive arbitrary files from the file system when exporting a note to PDF. Since the code injection has to take place as note content, there fore this exploit requires the attackers ability to modify a note. This will affect all instances, which have pdf export enabled. This issue has been fixed by https://github.com/hedgedoc/hedgedoc/commit/c1789474020a6d668d616464cb2da5e90e123f65 and is available in version 1.5.0. Starting the CodiMD/HedgeDoc instance with `CMD_ALLOW_PDF_EXPORT=false` or set `"allowPDFExport": false` in config.json can mitigate this issue for those who cannot upgrade. This exploit works because while PhantomJS doesn't actually render the `file:///` references to the PDF file itself, it still uses them internally, and exfiltration is possible, and easy through JavaScript rendering. The impact is pretty bad, as the attacker is able to read the CodiMD/HedgeDoc `config.json` file as well any other files on the filesystem. Even though the suggested Docker deploy option doesn't have many interesting files itself, the `config.json` still often contains sensitive information, database credentials, and maybe OAuth secrets among other things.
Severity ?
10 (Critical)
CWE
Assigner
References
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CVE-2021-21259 (GCVE-0-2021-21259)
Vulnerability from nvd – Published: 2021-01-22 17:10 – Updated: 2024-08-03 18:09
VLAI?
Title
Stored XSS in slide mode
Summary
HedgeDoc is open source software which lets you create real-time collaborative markdown notes. In HedgeDoc before version 1.7.2, an attacker can inject arbitrary JavaScript into a HedgeDoc note, which is executed when the note is viewed in slide mode. Depending on the configuration of the instance, the attacker may not need authentication to create or edit notes. The problem is patched in HedgeDoc 1.7.2. As a workaround, disallow loading JavaScript from 3rd party sites using the `Content-Security-Policy` header. Note that this will break some embedded content.
Severity ?
7.4 (High)
CWE
- CWE-79 - Cross-site Scripting (XSS)
Assigner
References
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