{"action":"Upgrade github.com/mattermost/mattermost-server to 10.5.12 or later.","affected":[{"fixed":"10.11.4","introduced":"10.11.0"},{"fixed":"10.5.12","introduced":"10.5.0"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2025-55074"],"ecosystem":"Go","epss":0.00182,"exploited":false,"fixed_versions":["10.11.4","10.5.12"],"ghsa_id":"GHSA-9hh7-6558-qfp2","id":"tcs_01M5KF5PZJRYJNBJYMBJZHGAFD","modified_at":"2025-11-27T08:52:50.122365Z","published_at":"2025-11-18T18:32:52Z","references":["https://osv.dev/vulnerability/GHSA-9hh7-6558-qfp2","https://nvd.nist.gov/vuln/detail/CVE-2025-55074","https://github.com/mattermost/mattermost/pull/33835","https://github.com/mattermost/mattermost/pull/33905","https://github.com/mattermost/mattermost/commit/98acefe911dd9de7edf47a7d825dd99f53141a52","https://github.com/mattermost/mattermost/commit/ba86dfc5876b354b9d3c20ff45c08ca6f8426149","https://github.com/mattermost/mattermost/commit/d72d437f1567ba0b639b6e4fd73bab06c51baab5","https://github.com/advisories/GHSA-9hh7-6558-qfp2","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"low","score":3},"sources":[{"source":"osv","source_id":"GHSA-9hh7-6558-qfp2","url":"https://osv.dev/vulnerability/GHSA-9hh7-6558-qfp2"}],"summary":"Mattermost allows other users to determine when users had read channels via channel member objects"}