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CVE-2025-6226

Estado: AnalizadaMedia (6.5)—

Mattermost versions 10.5.x <= 10.5.6, 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 9.11.x <= 9.11.16 fail to verify authorization when retrieving cached posts by PendingPostID which allows an authenticated user to read posts in private channels they don't have access to via guessing the PendingPostID of recently created posts.

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)

Mattermost — Mattermost Server

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-6226",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-6226",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-07-18T12:39:46.280328Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "responsibledisclosure@mattermost.com",
        "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": "responsibledisclosure@mattermost.com",
      "affectedData": [
        {
          "vendor": "Mattermost",
          "product": "Mattermost",
          "versions": [
            {
              "status": "affected",
              "version": "10.5.0",
              "versionType": "semver",
              "lessThanOrEqual": "10.5.6"
            },
            {
              "status": "affected",
              "version": "10.8.0",
              "versionType": "semver",
              "lessThanOrEqual": "10.8.1"
            },
            {
              "status": "affected",
              "version": "10.7.0",
              "versionType": "semver",
              "lessThanOrEqual": "10.7.3"
            },
            {
              "status": "affected",
              "version": "9.11.0",
              "versionType": "semver",
              "lessThanOrEqual": "9.11.16"
            },
            {
              "status": "unaffected",
              "version": "10.9.0"
            },
            {
              "status": "unaffected",
              "version": "10.5.8"
            },
            {
              "status": "unaffected",
              "version": "10.8.2"
            },
            {
              "status": "unaffected",
              "version": "10.7.4"
            },
            {
              "status": "unaffected",
              "version": "9.11.17"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2025-07-18T09:15:26.993",
  "references": [
    {
      "url": "https://mattermost.com/security-updates",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "responsibledisclosure@mattermost.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "responsibledisclosure@mattermost.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Mattermost versions 10.5.x <= 10.5.6, 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 9.11.x <= 9.11.16 fail to verify authorization when retrieving cached posts by PendingPostID which allows an authenticated user to read posts in private channels they don't have access to via guessing the PendingPostID of recently created posts."
    },
    {
      "lang": "es",
      "value": "Las versiones de Mattermost 10.5.x &lt;= 10.5.6, 10.8.x &lt;= 10.8.1, 10.7.x &lt;= 10.7.3, 9.11.x &lt;= 9.11.16 no pueden verificar la autorización al recuperar publicaciones en caché mediante PendingPostID, lo que permite que un usuario autenticado lea publicaciones en canales privados a los que no tiene acceso al adivinar el PendingPostID de publicaciones creadas recientemente."
    }
  ],
  "lastModified": "2026-06-17T10:01:25.027",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3F117291-CF45-4790-8BEB-E51DB0BAEF82",
              "versionEndExcluding": "9.11.17",
              "versionStartIncluding": "9.11.0"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C91210B2-4844-4928-9AE6-086E1C55AACB",
              "versionEndExcluding": "10.5.7",
              "versionStartIncluding": "10.5.0"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "16C5891E-6981-4903-A57E-A7AF4FDE2D1B",
              "versionEndExcluding": "10.7.4",
              "versionStartIncluding": "10.7.0"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7B0956AE-D67B-4FC3-98A8-67DD6904A90F",
              "versionEndExcluding": "10.8.2",
              "versionStartIncluding": "10.8.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "responsibledisclosure@mattermost.com"
}