CVE-2021-39226 (GCVE-0-2021-39226)

Vulnerability from cvelistv5 – Published: 2021-10-05 17:30 – Updated: 2025-10-21 23:25
VLAI? CISA
Summary
Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot "public_mode" configuration setting is set to true (vs default of false), unauthenticated users are able to delete the snapshot with the lowest database key by accessing the literal path: /api/snapshots-delete/:deleteKey. Regardless of the snapshot "public_mode" setting, authenticated users are able to delete the snapshot with the lowest database key by accessing the literal paths: /api/snapshots/:key, or /api/snapshots-delete/:deleteKey. The combination of deletion and viewing enables a complete walk through all snapshot data while resulting in complete snapshot data loss. This issue has been resolved in versions 8.1.6 and 7.5.11. If for some reason you cannot upgrade you can use a reverse proxy or similar to block access to the literal paths: /api/snapshots/:key, /api/snapshots-delete/:deleteKey, /dashboard/snapshot/:key, and /api/snapshots/:key. They have no normal function and can be disabled without side effects.
Severity ?
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
grafana grafana Affected: >= 8.0.0, < 8.1.6
Affected: < 7.5.11
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CISA Known Exploited Vulnerability
Data from the CISA Known Exploited Vulnerabilities Catalog

Date added: 2022-08-25

Due date: 2022-09-15

Required action: Apply updates per vendor instructions.

Used in ransomware: Unknown

Notes: https://grafana.com/blog/2021/10/05/grafana-7.5.11-and-8.1.6-released-with-critical-security-fix/; https://nvd.nist.gov/vuln/detail/CVE-2021-39226

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Regardless of the snapshot \\\"public_mode\\\" setting, authenticated users are able to delete the snapshot with the lowest database key by accessing the literal paths: /api/snapshots/:key, or /api/snapshots-delete/:deleteKey. The combination of deletion and viewing enables a complete walk through all snapshot data while resulting in complete snapshot data loss. This issue has been resolved in versions 8.1.6 and 7.5.11. If for some reason you cannot upgrade you can use a reverse proxy or similar to block access to the literal paths: /api/snapshots/:key, /api/snapshots-delete/:deleteKey, /dashboard/snapshot/:key, and /api/snapshots/:key. They have no normal function and can be disabled without side effects.\"},{\"lang\":\"es\",\"value\":\"Grafana es una plataforma de visualizaci\u00f3n de datos de c\u00f3digo abierto. En las versiones afectadas los usuarios no autenticados y autenticados son capaces de visualizar la snapshot con la clave de base de datos m\u00e1s baja accediendo a las rutas literales /dashboard/snapshot/:key, o /api/snapshots/:key. Si el ajuste de configuraci\u00f3n \\\"public_mode\\\" de la snapshot se establece en true (frente a default o false), unos usuarios no autenticados pueden eliminar la snapshot con la clave de base de datos m\u00e1s baja al acceder a la ruta literal /api/snapshots-delete/:deleteKey. Independientemente de la configuraci\u00f3n de \\\"public_mode\\\" de la snapshot, unos usuarios autenticados pueden eliminar la snapshot con la clave de base de datos m\u00e1s baja accediendo a las rutas literales: /api/snapshots/:key, o /api/snapshots-delete/:deleteKey. La combinaci\u00f3n de borrado y visualizaci\u00f3n permite un recorrido completo mediante todos los datos de las snapshots mientras se produce una p\u00e9rdida total de datos de las mismas. 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In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot \\\"public_mode\\\" configuration setting is set to true (vs default of false), unauthenticated users are able to delete the snapshot with the lowest database key by accessing the literal path: /api/snapshots-delete/:deleteKey. Regardless of the snapshot \\\"public_mode\\\" setting, authenticated users are able to delete the snapshot with the lowest database key by accessing the literal paths: /api/snapshots/:key, or /api/snapshots-delete/:deleteKey. The combination of deletion and viewing enables a complete walk through all snapshot data while resulting in complete snapshot data loss. This issue has been resolved in versions 8.1.6 and 7.5.11. If for some reason you cannot upgrade you can use a reverse proxy or similar to block access to the literal paths: /api/snapshots/:key, /api/snapshots-delete/:deleteKey, /dashboard/snapshot/:key, and /api/snapshots/:key. They have no normal function and can be disabled without side effects.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-287\", \"description\": \"CWE-287: Improper Authentication\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2021-10-30T01:08:52.000Z\"}, \"x_legacyV4Record\": {\"impact\": {\"cvss\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 9.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, \"source\": {\"advisory\": \"GHSA-69j6-29vr-p3j9\", \"discovery\": \"UNKNOWN\"}, \"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"version\": {\"version_data\": [{\"version_value\": \"\u003e= 8.0.0, \u003c 8.1.6\"}, {\"version_value\": \"\u003c 7.5.11\"}]}, \"product_name\": \"grafana\"}]}, \"vendor_name\": \"grafana\"}]}}, \"data_type\": \"CVE\", \"references\": {\"reference_data\": [{\"url\": \"https://github.com/grafana/grafana/security/advisories/GHSA-69j6-29vr-p3j9\", \"name\": \"https://github.com/grafana/grafana/security/advisories/GHSA-69j6-29vr-p3j9\", \"refsource\": \"CONFIRM\"}, {\"url\": \"https://github.com/grafana/grafana/commit/2d456a6375855364d098ede379438bf7f0667269\", \"name\": \"https://github.com/grafana/grafana/commit/2d456a6375855364d098ede379438bf7f0667269\", \"refsource\": \"MISC\"}, {\"url\": \"https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-11/\", \"name\": \"https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-11/\", \"refsource\": \"MISC\"}, {\"url\": \"https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-1-6/\", \"name\": \"https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-1-6/\", \"refsource\": \"MISC\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2021/10/05/4\", \"name\": \"[oss-security] 20211005 CVE-2021-39226 Grafana snapshot authentication bypass\", \"refsource\": \"MLIST\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E6ANHRDBXQT6TURLP2THM26ZPDINFBEG/\", \"name\": \"FEDORA-2021-dd83dc8b0b\", \"refsource\": \"FEDORA\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20211029-0008/\", \"name\": \"https://security.netapp.com/advisory/ntap-20211029-0008/\", \"refsource\": \"CONFIRM\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DCKBFUSY6V4VU5AQUYWKISREZX5NLQJT/\", \"name\": \"FEDORA-2021-01588ab0bf\", \"refsource\": \"FEDORA\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot \\\"public_mode\\\" configuration setting is set to true (vs default of false), unauthenticated users are able to delete the snapshot with the lowest database key by accessing the literal path: /api/snapshots-delete/:deleteKey. Regardless of the snapshot \\\"public_mode\\\" setting, authenticated users are able to delete the snapshot with the lowest database key by accessing the literal paths: /api/snapshots/:key, or /api/snapshots-delete/:deleteKey. The combination of deletion and viewing enables a complete walk through all snapshot data while resulting in complete snapshot data loss. This issue has been resolved in versions 8.1.6 and 7.5.11. If for some reason you cannot upgrade you can use a reverse proxy or similar to block access to the literal paths: /api/snapshots/:key, /api/snapshots-delete/:deleteKey, /dashboard/snapshot/:key, and /api/snapshots/:key. They have no normal function and can be disabled without side effects.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-287: Improper Authentication\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2021-39226\", \"STATE\": \"PUBLIC\", \"TITLE\": \" Snapshot authentication bypass in grafana\", \"ASSIGNER\": \"security-advisories@github.com\"}}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-39226\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T18:45:56.224Z\", \"dateReserved\": \"2021-08-16T00:00:00.000Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2021-10-05T17:30:11.000Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.