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CVE-2021-21269

Estado: ModificadaMedia (6.5)—

Keymaker es un servidor de páginas de lista de servidores Matrix Community basado en Mastodon Community Finder. En Keymaker anterior a versión 0.2.0, el endpoint de activos no comprobaba la extensión. El método de rust "join" sin verificar la entrada del usuario podría haber hecho que sea posible realizar un ataque de Salto de Ruta causando la lectura de más archivos de los permitidos. Esto es corregido en la versión 0.2.0

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)

Keymaker Project — Keymaker

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-21269",
  "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": "CHANGED",
          "version": "3.1",
          "baseScore": 7.7,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4,
        "exploitabilityScore": 3.1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "keymaker-mx",
          "product": "keymaker",
          "versions": [
            {
              "status": "affected",
              "version": "< 0.2.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-01-20T18:15:12.627",
  "references": [
    {
      "url": "https://github.com/keymaker-mx/keymaker/commit/63f3012b390ff1519a84100df9e5dff5058bb926",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/keymaker-mx/keymaker/security/advisories/GHSA-pg25-xfcf-vjvm",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/keymaker-mx/keymaker/commit/63f3012b390ff1519a84100df9e5dff5058bb926",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/keymaker-mx/keymaker/security/advisories/GHSA-pg25-xfcf-vjvm",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Keymaker is a Mastodon Community Finder based Matrix Community serverlist page Server. In Keymaker before version 0.2.0, the assets endpoint did not check for the extension. The rust `join` method without checking user input might have made it abe to do a Path Traversal attack causing to read more files than allowed. This is fixed in version 0.2.0."
    },
    {
      "lang": "es",
      "value": "Keymaker es un servidor de páginas de lista de servidores Matrix Community basado en Mastodon Community Finder.&#xa0;En Keymaker anterior a versión 0.2.0, el endpoint de activos no comprobaba la extensión.&#xa0;El método de rust \"join\" sin verificar la entrada del usuario podría haber hecho que sea posible realizar un ataque de Salto de Ruta causando la lectura de más archivos de los permitidos.&#xa0;Esto es corregido en la versión 0.2.0"
    }
  ],
  "lastModified": "2026-06-17T03:35:09.663",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:keymaker_project:keymaker:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DB094811-E3DB-42F0-B93C-9A852D9B92AC",
              "versionEndExcluding": "0.2.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}