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CVE-2021-43813

Estado: ModificadaMedia (4.3)—

Grafana is an open-source platform for monitoring and observability. Grafana prior to versions 8.3.2 and 7.5.12 contains a directory traversal vulnerability for fully lowercase or fully uppercase .md files. The vulnerability is limited in scope, and only allows access to files with the extension .md to authenticated users only. Grafana Cloud instances have not been affected by the vulnerability. Users should upgrade to patched versions 8.3.2 or 7.5.12.

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For users who cannot upgrade, running a reverse proxy in front of Grafana that normalizes the PATH of the request will mitigate the vulnerability. The proxy will have to also be able to handle url encoded paths. Alternatively, for fully lowercase or fully uppercase .md files, users can block /api/plugins/.*/markdown/.* without losing any functionality beyond inlined plugin help text.

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).

Tecnologías afectadas (1)

Grafana — Grafana

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-43813",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "grafana",
          "product": "grafana",
          "versions": [
            {
              "status": "affected",
              "version": ">= 5.0.0, < 7.5.12"
            },
            {
              "status": "affected",
              "version": ">= 8.0.0, < 8.3.2"
            }
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        }
      ]
    }
  ],
  "published": "2021-12-10T18:15:08.260",
  "references": [
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      "url": "http://www.openwall.com/lists/oss-security/2021/12/10/4",
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      "tags": [
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    {
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    },
    {
      "url": "https://grafana.com/blog/2021/12/10/grafana-8.3.2-and-7.5.12-released-with-moderate-severity-security-fix/",
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      "url": "https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-12/",
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    {
      "url": "http://www.openwall.com/lists/oss-security/2021/12/10/4",
      "tags": [
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        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/github/securitylab-vulnerabilities/commit/689fc5d9fd665be4d5bba200a6a433b532172d0f",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "https://github.com/grafana/grafana/commit/fd48aee61e4328aae8d5303a9efd045fa0ca308d",
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      "tags": [
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        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://grafana.com/blog/2021/12/10/grafana-8.3.2-and-7.5.12-released-with-moderate-severity-security-fix/",
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        "Release Notes",
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      "tags": [
        "Release Notes",
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    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20220107-0006/",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Grafana is an open-source platform for monitoring and observability. Grafana prior to versions 8.3.2 and 7.5.12 contains a directory traversal vulnerability for fully lowercase or fully uppercase .md files. The vulnerability is limited in scope, and only allows access to files with the extension .md to authenticated users only. Grafana Cloud instances have not been affected by the vulnerability. Users should upgrade to patched versions 8.3.2 or 7.5.12. For users who cannot upgrade, running a reverse proxy in front of Grafana that normalizes the PATH of the request will mitigate the vulnerability. The proxy will have to also be able to handle url encoded paths. Alternatively, for fully lowercase or fully uppercase .md files, users can block /api/plugins/.*/markdown/.* without losing any functionality beyond inlined plugin help text."
    },
    {
      "lang": "es",
      "value": "Grafana es una plataforma de código abierto para la monitorización y la observabilidad. Grafana versiones anteriores a 8.3.2 y 7.5.12, contiene una vulnerabilidad de salto de directorio para archivos .md completamente en minúsculas o en mayúsculas. La vulnerabilidad presenta un alcance limitado y sólo permite el acceso a los archivos con la extensión .md a usuarios autentificados. Las instancias de Grafana Cloud no han sido afectadas por la vulnerabilidad. Los usuarios deben actualizar a las versiones parcheadas 8.3.2 o 7.5.12. Para usuarios que no puedan actualizar, la ejecución de un proxy inverso frente a Grafana que normalice el PATH de la petición mitigará la vulnerabilidad. El proxy también tendrá que ser capaz de manejar rutas codificadas con url. Alternativamente, para archivos .md completamente en minúsculas o en mayúsculas, los usuarios pueden bloquear /api/plugins/.*/markdown/.* sin perder ninguna funcionalidad más allá del texto de ayuda del plugin alineado"
    }
  ],
  "lastModified": "2026-06-17T04:11:29.440",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C8A7F175-5768-4685-A192-25B4D97FF0CC",
              "versionEndExcluding": "7.5.12",
              "versionStartIncluding": "5.0.0"
            },
            {
              "criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "072437F7-4A16-4373-9026-7C20B0D2AFB8",
              "versionEndExcluding": "8.3.2",
              "versionStartIncluding": "8.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}