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CVE-2025-12689

Estado: AnalizadaMedia (6.5)—

Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request.

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-2025-12689",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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          "id": "CVE-2025-12689",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
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              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-12-17T18:52:40.079447Z"
        }
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    ],
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          "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"
        },
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        "exploitabilityScore": 2.8
      }
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  },
  "affected": [
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      "affectedData": [
        {
          "vendor": "Mattermost",
          "product": "Mattermost",
          "versions": [
            {
              "status": "affected",
              "version": "11.0.0",
              "versionType": "semver",
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            },
            {
              "status": "affected",
              "version": "10.12.0",
              "versionType": "semver",
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              "status": "affected",
              "version": "10.11.0",
              "versionType": "semver",
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            },
            {
              "status": "unaffected",
              "version": "11.1.0"
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              "version": "11.0.5"
            },
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              "version": "10.12.3"
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              "version": "10.11.7"
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  "published": "2025-12-17T19:16:00.537",
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      "tags": [
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      ],
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    }
  ],
  "vulnStatus": "Analyzed",
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      "type": "Secondary",
      "source": "responsibledisclosure@mattermost.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1287"
        }
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  ],
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    {
      "lang": "en",
      "value": "Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request."
    }
  ],
  "lastModified": "2026-06-17T08:32:48.490",
  "configurations": [
    {
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}