{"id":"CVE-2025-12559","aliases":["GHSA-4g87-9x45-cx2h","GO-2025-4169"],"url":"https://o3.security/vulnerability/CVE-2025-12559","summary":"Information Disclosure in Common Teams API","details":"Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint","published":"2025-11-27T16:36:30.545Z","modified":"2026-08-12T03:51:23.964583892Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"8.0.0-20251015091448-abbf01b9db45"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"11.0.3"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"10.12.2"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"10.11.5"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"10.5.13"}],"fix":{"url":"https://github.com/mattermost/mattermost/pull/34110","label":"mattermost/mattermost#34110"},"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/12xxx/CVE-2025-12559.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-12559"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/34110"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/5d8719042c1807da59ac8a821624eb01152d8495"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/649aee8fa9184ca59bd66022a33b8f8918e413aa"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/7ccb62db7958abd6a4b21a06c5a4f5367a8f8b1f"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/9f54e5cdc3aef412945ff0e6a58338f7b549bdda"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/abbf01b9db45d1850eaf3701ea8362b910193ffd"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:23.964583892Z"}}