{"id":"CVE-2025-12689","state":"PUBLISHED","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.","publishedAt":"2025-12-17T18:14:10.973Z","updatedAt":"2025-12-17T19:29:54.734Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"Mattermost"},"assigner":"Mattermost","products":["Mattermost Mattermost"],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"11.0.0","status":"affected","lessThanOrEqual":"11.0.4","versionType":"semver"},{"version":"10.12.0","status":"affected","lessThanOrEqual":"10.12.2","versionType":"semver"},{"version":"10.11.0","status":"affected","lessThanOrEqual":"10.11.6","versionType":"semver"},{"version":"11.1.0","status":"unaffected"},{"version":"11.0.5","status":"unaffected"},{"version":"10.12.3","status":"unaffected"},{"version":"10.11.7","status":"unaffected"}]}],"references":["https://mattermost.com/security-updates"],"weaknesses":["CWE-1287"],"ingestedAt":"2026-10-29T20:08:31.050Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/12xxx/CVE-2025-12689.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-12689","state":"PUBLISHED","datePublished":"2025-12-17T18:14:10.973Z","dateUpdated":"2025-12-17T19:29:54.734Z","assignerShortName":"Mattermost","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateReserved":"2025-11-04T10:06:23.912Z"},"containers":{"cna":{"title":"DoS in Calls plugin via malformed UTF-8 in WebSocket request","descriptions":[{"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."}],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"11.0.0","status":"affected","lessThanOrEqual":"11.0.4","versionType":"semver"},{"version":"10.12.0","status":"affected","lessThanOrEqual":"10.12.2","versionType":"semver"},{"version":"10.11.0","status":"affected","lessThanOrEqual":"10.11.6","versionType":"semver"},{"version":"11.1.0","status":"unaffected"},{"version":"11.0.5","status":"unaffected"},{"version":"10.12.3","status":"unaffected"},{"version":"10.11.7","status":"unaffected"}]}],"references":[{"url":"https://mattermost.com/security-updates"}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1287","description":"CWE-1287: Improper Validation of Specified Type of Input","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"Mattermost","orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateUpdated":"2025-12-17T18:14:10.973Z"},"credits":[{"lang":"en","type":"finder","value":"National Security Agency"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>Update Mattermost to versions 11.1.0, 11.0.5, 10.12.3, 10.11.7 or higher.</p>"}],"value":"Update Mattermost to versions 11.1.0, 11.0.5, 10.12.3, 10.11.7 or higher."}],"source":{"advisory":"MMSA-2025-00539","defect":["https://mattermost.atlassian.net/browse/MM-66169"],"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-17T18:52:40.079447Z","id":"CVE-2025-12689","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-12-17T19:29:54.734Z"}}]}}}