CVE-2025-61682 (GCVE-0-2025-61682)
Vulnerability from cvelistv5 – Published: 2026-09-18 16:09 – Updated: 2026-09-18 17:23
VLAI
EPSS
VEX
Title
Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes
Summary
Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Versions starting in 3.1.0 and prior to 7.0.0 insert the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext. Version 7.0.0 patches the issue.
Severity
8.6 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 17:23 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/SemanticMediaWiki/SemanticMedi… | x_refsource_CONFIRM |
| https://github.com/SemanticMediaWiki/SemanticMedi… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| SemanticMediaWiki | SemanticMediaWiki |
Affected:
>= 3.1.0, < 7.0.0
|
guessed |
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FKIE_CVE-2025-61682
Vulnerability from fkie_nvd - Published: 2026-09-18 16:17 - Updated: 2026-10-14 13:10
Severity
Summary
Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Versions starting in 3.1.0 and prior to 7.0.0 insert the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext. Version 7.0.0 patches the issue.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"product": "SemanticMediaWiki",
"vendor": "SemanticMediaWiki",
"versions": [
{
"status": "affected",
"version": "\u003e= 3.1.0, \u003c 7.0.0"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"cveTags": [],
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{
"lang": "en",
"value": "Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki\u0027s pages. Versions starting in 3.1.0 and prior to 7.0.0 insert the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext. Version 7.0.0 patches the issue."
},
{
"lang": "es",
"value": "Semantic MediaWiki es una extensi\u00f3n gratuita y de c\u00f3digo abierto para MediaWiki que permite a los usuarios almacenar y consultar datos dentro de las p\u00e1ginas de la wiki. Versiones a partir de la 3.1.0 y anteriores a la 7.0.0 insertan el valor no saneado de un atributo de datos en el DOM como HTML, lo que permite XSS almacenado a trav\u00e9s de wikitexto. La versi\u00f3n 7.0.0 corrige el problema."
}
],
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"lastModified": "2026-10-14T13:10:00.187",
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"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L",
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},
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GHSA-HG8H-557G-Q8PP
Vulnerability from github – Published: 2026-09-18 16:07 – Updated: 2026-09-18 16:07
VLAI
Summary
Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes
Details
Summary
The SemanticMediaWiki extension inserts the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext.
Details
In ext.smw.js, the data-subtab attribute of all elements with the smw-subtab class is parsed as JSON and appended to the innerHTML of the element:
https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/62f1fa765b626e21d88999b97a3e8029db9fd385/res/smw/ext.smw.js#L37-L42
However, most data attributes (except for reserved ones) like data-subtab can be used in wikitext. Therefore, it is possible to insert arbitrary HTML and JS through wikitext.
The decoded (" will turn to ", but it will be decoded when it is retrieved through .dataset) value of the data-subtab attribute in the payload is "<img src='' onerror=alert(1)>". This is valid JSON and returns a string with <img src='' onerror=alert(1)> when being decoded.
PoC
- Create a page with the following contents:
{{#tag:div|
|class=smw-subtab
|data-subtab=""<img src='' onerror=alert(1)>""
}}
- Visit the page
Impact
Arbitrary HTML can be inserted into the DOM by any user with the edit right, allowing for JavaScript to be executed.
Severity
8.6 (High)
{
"affected": [
{
"package": {
"ecosystem": "Packagist",
"name": "mediawiki/semantic-media-wiki"
},
"ranges": [
{
"events": [
{
"introduced": "3.1.0"
},
{
"fixed": "7.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-61682"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2026-09-18T16:07:29Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "### Summary\nThe SemanticMediaWiki extension inserts the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext.\n\n### Details\n\nIn `ext.smw.js`, the `data-subtab` attribute of all elements with the `smw-subtab` class is parsed as JSON and appended to the `innerHTML` of the element:\nhttps://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/62f1fa765b626e21d88999b97a3e8029db9fd385/res/smw/ext.smw.js#L37-L42\nHowever, most data attributes (except for reserved ones) like `data-subtab` can be used in wikitext. Therefore, it is possible to insert arbitrary HTML and JS through wikitext.\nThe decoded (`\"` will turn to `\u0026quot;`, but it will be decoded when it is retrieved through `.dataset`) value of the `data-subtab` attribute in the payload is `\"\u003cimg src=\u0027\u0027 onerror=alert(1)\u003e\"`. This is valid JSON and returns a string with `\u003cimg src=\u0027\u0027 onerror=alert(1)\u003e` when being decoded.\n\n### PoC\n\n1. Create a page with the following contents:\n```html\n{{#tag:div|\n|class=smw-subtab\n|data-subtab=\"\"\u003cimg src=\u0027\u0027 onerror=alert(1)\u003e\"\"\n}}\n```\n2. Visit the page\n\n\u003cimg width=\"991\" height=\"465\" alt=\"image\" src=\"https://github.com/user-attachments/assets/5d28d852-72d6-41dc-a59a-faac1610015f\" /\u003e\n\u003cimg width=\"497\" height=\"69\" alt=\"image\" src=\"https://github.com/user-attachments/assets/02309390-0b40-46d9-b690-de8cd25dba59\" /\u003e\n\n### Impact\n\nArbitrary HTML can be inserted into the DOM by any user with the `edit` right, allowing for JavaScript to be executed.",
"id": "GHSA-hg8h-557g-q8pp",
"modified": "2026-09-18T16:07:29Z",
"published": "2026-09-18T16:07:29Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-hg8h-557g-q8pp"
},
{
"type": "PACKAGE",
"url": "https://github.com/SemanticMediaWiki/SemanticMediaWiki"
},
{
"type": "WEB",
"url": "https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.0.0"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L",
"type": "CVSS_V3"
}
],
"summary": "Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes"
}
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.