{"id":"CVE-2025-12689","revision":"a8a7815f786d46c9af17f4ce213db478","records":[{"revision":"a8a7815f786d46c9af17f4ce213db478","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-12689","aliases":[],"title":"DoS in Calls plugin via malformed UTF-8 in WebSocket 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":"2025-12-17T18:14:10.973+00:00","modifiedAt":"2025-12-17T19:29:54.734+00:00","affected":[{"ecosystem":"Vendor product","name":"Mattermost","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"Mattermost\",\n                    \"vendor\": \"Mattermost\",\n                    \"versions\": [\n                        {\n                            \"lessThanOrEqual\": \"11.0.4\",\n                            \"status\": \"affected\",\n                            \"version\": \"11.0.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThanOrEqual\": \"10.12.2\",\n                            \"status\": \"affected\",\n                            \"version\": \"10.12.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThanOrEqual\": \"10.11.6\",\n                            \"status\": \"affected\",\n                            \"version\": \"10.11.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"11.1.0\"\n                        },\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"11.0.5\"\n                        },\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"10.12.3\"\n                        },\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"10.11.7\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","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://www.cve.org/CVERecord?id=CVE-2025-12689","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-12689","identifiers":["CVE-2025-12689"]},"retained":false,"historicalAffected":[]}],"coverage":[]}