{"id":"CVE-2025-12689","sourceIdentifier":"responsibledisclosure@mattermost.com","published":"2025-12-17T19:16:00.537","lastModified":"2026-10-13T11:10:00.203","vulnStatus":"Analyzed","cveTags":[],"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."},{"lang":"es","value":"Las versiones de Mattermost 11.0.x menor o igual que 11.0.4, 10.12.x menor o igual que 10.12.2, 10.11.x menor o igual que 10.11.6 no verifican el campo de solicitud de WebSocket en busca de un formato UTF-8 correcto, lo que permite al atacante bloquear el complemento de Llamadas mediante el envío de una solicitud malformada."}],"affected":[{"source":"responsibledisclosure@mattermost.com","affectedData":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"11.0.0","lessThanOrEqual":"11.0.4","versionType":"semver","status":"affected"},{"version":"10.12.0","lessThanOrEqual":"10.12.2","versionType":"semver","status":"affected"},{"version":"10.11.0","lessThanOrEqual":"10.11.6","versionType":"semver","status":"affected"},{"version":"11.1.0","status":"unaffected"},{"version":"11.0.5","status":"unaffected"},{"version":"10.12.3","status":"unaffected"},{"version":"10.11.7","status":"unaffected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"responsibledisclosure@mattermost.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2025-12-17T18:52:40.079447Z","id":"CVE-2025-12689","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"responsibledisclosure@mattermost.com","type":"Secondary","description":[{"lang":"en","value":"CWE-1287"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","versionStartIncluding":"10.11.0","versionEndExcluding":"10.11.7","matchCriteriaId":"EB4AD9AE-B2DB-4D49-87AD-FA5F9CE6A0C8"},{"vulnerable":true,"criteria":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","versionStartIncluding":"10.12.0","versionEndExcluding":"10.12.3","matchCriteriaId":"DD0ED714-56F9-4C84-B84D-3BF658940568"},{"vulnerable":true,"criteria":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","versionStartIncluding":"11.0.0","versionEndExcluding":"11.0.5","matchCriteriaId":"6130B691-5017-418D-A28A-84A83AA2496C"}]}]}],"references":[{"url":"https://mattermost.com/security-updates","source":"responsibledisclosure@mattermost.com","tags":["Vendor Advisory"]}]}