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CVE-2021-39226

Estado: AnalizadaAlta (7.3)⚠ Explotación activa💥 Exploit

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.

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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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

CISA KEV — explotada activamente

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad en aplicación web expuesta (Grafana) sin autenticación requerida (AV:N PR:N) que permite acceso no autorizado a snapshots, lectura de datos sensibles y su eliminación. CWE-287 (autenticación débil) y CWE-862 (autorización deficiente) confirman fallo de control de acceso.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser TrainingUser Account Management

Tecnologías afectadas (2)

Fedoraproject — FedoraGrafana — Grafana

CWE

Referencias

JSON original (NVD)

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      "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."
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      "value": "Grafana es una plataforma de visualización de datos de código abierto. En las versiones afectadas los usuarios no autenticados y autenticados son capaces de visualizar la snapshot con la clave de base de datos más baja accediendo a las rutas literales /dashboard/snapshot/:key, o /api/snapshots/:key. Si el ajuste de configuración \"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 más baja al acceder a la ruta literal /api/snapshots-delete/:deleteKey. Independientemente de la configuración de \"public_mode\" de la snapshot, unos usuarios autenticados pueden eliminar la snapshot con la clave de base de datos más baja accediendo a las rutas literales: /api/snapshots/:key, o /api/snapshots-delete/:deleteKey. La combinación de borrado y visualización permite un recorrido completo mediante todos los datos de las snapshots mientras se produce una pérdida total de datos de las mismas. Este problema se ha resuelto en las versiones 8.1.6 y 7.5.11. Si por alguna razón no puede actualizar puede usar un proxy inverso o similar para bloquear el acceso a las rutas literales /api/snapshots/:key, /api/snapshots-delete/:deleteKey, /dashboard/snapshot/:key, y /api/snapshots/:key. No tienen ninguna función normal y pueden ser deshabilitadas sin efectos secundarios"
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  "lastModified": "2026-06-17T04:03:21.130",
  "cisaActionDue": "2022-09-15",
  "cisaExploitAdd": "2022-08-25",
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