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CVE-2024-39777

Estado: AnalizadaCrítica (9.6)—

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to disallow unsolicited invites to expose access to local channels, when shared channels are enabled, which allows a malicious remote to send an invite with the ID of an existing local channel, and that local channel will then become shared without the consent of the local admin.

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

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-39777",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-39777",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-08-01T14:33:32.102355Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "responsibledisclosure@mattermost.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.7,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.8,
        "exploitabilityScore": 2.3
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 9.6,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.8,
        "exploitabilityScore": 3.1
      }
    ]
  },
  "affected": [
    {
      "source": "responsibledisclosure@mattermost.com",
      "affectedData": [
        {
          "vendor": "Mattermost",
          "product": "Mattermost",
          "versions": [
            {
              "status": "affected",
              "version": "9.9.0"
            },
            {
              "status": "affected",
              "version": "9.5.0",
              "versionType": "semver",
              "lessThanOrEqual": "9.5.6"
            },
            {
              "status": "affected",
              "version": "9.7.0",
              "versionType": "semver",
              "lessThanOrEqual": "9.7.5"
            },
            {
              "status": "affected",
              "version": "9.8.0",
              "versionType": "semver",
              "lessThanOrEqual": "9.8.1"
            },
            {
              "status": "unaffected",
              "version": "9.10.0"
            },
            {
              "status": "unaffected",
              "version": "9.9.1"
            },
            {
              "status": "unaffected",
              "version": "9.5.7"
            },
            {
              "status": "unaffected",
              "version": "9.7.6"
            },
            {
              "status": "unaffected",
              "version": "9.8.2"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:mattermost:mattermost:-:*:*:*:*:*:*:*"
          ],
          "vendor": "mattermost",
          "product": "mattermost",
          "versions": [
            {
              "status": "affected",
              "version": "9.9.0"
            },
            {
              "status": "affected",
              "version": "9.5.0",
              "versionType": "semver",
              "lessThanOrEqual": "9.5.6"
            },
            {
              "status": "affected",
              "version": "9.7.0",
              "versionType": "semver",
              "lessThanOrEqual": "9.7.5"
            },
            {
              "status": "affected",
              "version": "9.8.0",
              "versionType": "semver",
              "lessThanOrEqual": "9.8.1"
            },
            {
              "status": "unaffected",
              "version": "9.10.0"
            },
            {
              "status": "unaffected",
              "version": "9.9.1"
            },
            {
              "status": "unaffected",
              "version": "9.5.7"
            },
            {
              "status": "unaffected",
              "version": "9.7.6"
            },
            {
              "status": "unaffected",
              "version": "9.8.2"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2024-08-01T15:15:12.370",
  "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-284"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to disallow unsolicited invites to expose access to local channels, when shared channels are enabled, which allows a malicious remote to send an invite with the ID of an existing local channel, and that local channel will then become shared without the consent of the local admin."
    },
    {
      "lang": "es",
      "value": " Las versiones de Mattermost 9.9.x &lt;= 9.9.0, 9.5.x &lt;= 9.5.6, 9.7.x &lt;= 9.7.5 y 9.8.x &lt;= 9.8.1 no permiten invitaciones no solicitadas para exponer el acceso a canales locales, cuando los canales compartidos están habilitados, lo que permite que un control remoto malicioso envíe una invitación con el ID de un canal local existente, y ese canal local se compartirá sin el consentimiento del administrador local."
    }
  ],
  "lastModified": "2026-06-17T07:42:46.440",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0942D308-9462-4C2A-A9FE-838EB5842E02",
              "versionEndExcluding": "9.5.7",
              "versionStartIncluding": "9.5.0"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "642355DC-0EF1-4631-89D0-694AB7C9EF78",
              "versionEndExcluding": "9.7.6",
              "versionStartIncluding": "9.7.0"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "00E80458-F38E-46EB-98FD-1CADD3FCE335",
              "versionEndExcluding": "9.8.2",
              "versionStartIncluding": "9.8.0"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost:9.9.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DA215755-4D08-4B4D-9736-DAF54D2F0B9C"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "responsibledisclosure@mattermost.com"
}