{"id":"CVE-2025-12689","revision":"45688671512448aa9978f25e463f6723","records":[{"revision":"45688671512448aa9978f25e463f6723","observedAt":"2026-10-25T01:17:29.167+00:00","statement":{"source":"nvd","id":"CVE-2025-12689","aliases":[],"title":"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.","description":"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.","state":0,"publishedAt":"2025-12-17T19:16:00.537+00:00","modifiedAt":"2026-10-13T11:10:00.203+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · responsibledisclosure@mattermost.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-12689","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-1287"],"productCriteria":["cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2025-12-17T19:16:00.537","lastModified":"2026-10-13T11:10:00.203"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2025-12689","identifiers":["CVE-2025-12689"]},"retained":false,"historicalAffected":[]}],"coverage":[]}