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CVE-2025-21088

Estado: AnalizadaMedia (6.5)—

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input.

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)

Mostrar
{
  "id": "CVE-2025-21088",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-21088",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-01-15T16:19:00.477273Z"
        }
      }
    ],
    "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:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      },
      {
        "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:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "responsibledisclosure@mattermost.com",
      "affectedData": [
        {
          "vendor": "Mattermost",
          "product": "Mattermost",
          "versions": [
            {
              "status": "affected",
              "version": "10.2.0"
            },
            {
              "status": "affected",
              "version": "9.11.0",
              "versionType": "semver",
              "lessThanOrEqual": "9.11.5"
            },
            {
              "status": "affected",
              "version": "10.0.0",
              "versionType": "semver",
              "lessThanOrEqual": "10.0.3"
            },
            {
              "status": "affected",
              "version": "10.1.0",
              "versionType": "semver",
              "lessThanOrEqual": "10.1.3"
            },
            {
              "status": "unaffected",
              "version": "10.3.0"
            },
            {
              "status": "unaffected",
              "version": "10.2.1"
            },
            {
              "status": "unaffected",
              "version": "9.11.6"
            },
            {
              "status": "unaffected",
              "version": "10.0.4"
            },
            {
              "status": "unaffected",
              "version": "10.1.4"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2025-01-15T16:15:32.413",
  "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-704"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input."
    },
    {
      "lang": "es",
      "value": "Las versiones de Mattermost 10.2.x &lt;= 10.2.0, 9.11.x &lt;= 9.11.5, 10.0.x &lt;= 10.0.3, 10.1.x &lt;= 10.1.3 no logran validar correctamente el estilo del proto suministrado al estilo de una acción en post.props.attachments, lo que permite que un atacante bloquee el frontend a través de una entrada maliciosa manipulada."
    }
  ],
  "lastModified": "2026-06-17T08:42:35.123",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "61B308B7-C55B-4250-BAA0-BF949DF9EA63",
              "versionEndExcluding": "9.11.6",
              "versionStartIncluding": "9.11.0"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6470CB79-F54D-4FC3-ACF4-E38A5CD15782",
              "versionEndExcluding": "10.0.4",
              "versionStartIncluding": "10.0.0"
            },
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              "vulnerable": true,
              "matchCriteriaId": "C9D87A5B-2D40-446B-B9FB-4376B846432F",
              "versionEndExcluding": "10.1.4",
              "versionStartIncluding": "10.1.0"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost_server:10.2.0:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DE143AEE-7950-4B0B-ABAE-4C3D29866F25"
            }
          ],
          "operator": "OR"
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  "sourceIdentifier": "responsibledisclosure@mattermost.com"
}