{"id":"CVE-2025-55074","aliases":["GHSA-9hh7-6558-qfp2","GO-2025-4133"],"url":"https://o3.security/vulnerability/CVE-2025-55074","summary":"Channel member objects leak read status","details":"Mattermost versions 10.11.x <= 10.11.3, and 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects.","published":"2025-11-18T15:23:29.642Z","modified":"2026-08-12T03:51:26.595717019Z","cvss":{"score":3,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"10.11.4"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"10.5.12"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"8.0.0-20250905150616-ba86dfc5876b6"}],"fix":{"url":"https://github.com/mattermost/mattermost/pull/33835","label":"mattermost/mattermost#33835"},"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55074.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-55074"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/33835"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/33905"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/98acefe911dd9de7edf47a7d825dd99f53141a52"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/ba86dfc5876b354b9d3c20ff45c08ca6f8426149"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/d72d437f1567ba0b639b6e4fd73bab06c51baab5"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-9hh7-6558-qfp2"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:26.595717019Z"}}