{"schema_version":"1.7.3","id":"GHSA-9hh7-6558-qfp2","published":"2025-11-18T18:32:52Z","modified":"2025-11-27T08:52:50.122365Z","aliases":["CVE-2025-55074","GO-2025-4133"],"summary":"Mattermost allows other users to determine when users had read channels via channel member objects","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.","affected":[{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"10.11.0"},{"fixed":"10.11.4"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-9hh7-6558-qfp2/GHSA-9hh7-6558-qfp2.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"10.5.0"},{"fixed":"10.5.12"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-9hh7-6558-qfp2/GHSA-9hh7-6558-qfp2.json"}},{"package":{"name":"github.com/mattermost/mattermost/server/v8","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.0.0-20250905150616-ba86dfc5876b6"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-9hh7-6558-qfp2/GHSA-9hh7-6558-qfp2.json"}}],"references":[{"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"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"database_specific":{"cwe_ids":["CWE-276"],"github_reviewed":true,"github_reviewed_at":"2025-11-18T21:03:28Z","nvd_published_at":"2025-11-18T16:15:44Z","severity":"LOW"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N"}]}