{"id":"CVE-2025-13821","aliases":["GHSA-pp9j-pf5c-659x","GO-2026-4524"],"url":"https://o3.security/vulnerability/CVE-2025-13821","summary":"User profile update exposes password hash and MFA secrets","details":"Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to sanitize sensitive data in WebSocket messages which allows authenticated users to exfiltrate password hashes and MFA secrets via profile nickname updates or email verification events. Mattermost Advisory ID: MMSA-2025-00560","published":"2026-02-16T11:57:25.588Z","modified":"2026-09-18T03:45:23.904536596Z","cvss":{"score":5.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"8.0.0-20251210191531-cd17b61de41b"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"5.3.2-0.20251210191531-cd17b61de41b"}],"fix":{"url":"https://github.com/mattermost/mattermost/commit/cd17b61de41bf0a49b524bb91ce0bbe859e5a100","label":"mattermost/mattermost@cd17b61"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/13xxx/CVE-2025-13821.json"},{"type":"ADVISORY","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-13821"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/cd17b61de41bf0a49b524bb91ce0bbe859e5a100"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-18T03:45:23.904536596Z"}}