{"id":"GHSA-j6gg-r5jc-47cm","summary":"Mattermost fails to properly restrict access to archived channel search API","details":"Mattermost versions \u003c 11 fail to properly restrict access to archived channel search API which allows guest users to discover archived public channels via the `/api/v4/teams/{team_id}/channels/search_archived` endpoint","aliases":["CVE-2025-11776","GO-2025-4126"],"modified":"2025-11-17T19:58:46.484873Z","published":"2025-11-14T09:30:27Z","database_specific":{"nvd_published_at":"2025-11-14T08:15:43Z","cwe_ids":["CWE-863"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2025-11-14T22:08:04Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-11776"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/c8d66301415d5b447df0e829bdbaa92e8a83ecf8"},{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"PACKAGE","url":"github.com/mattermost/mattermost"}],"affected":[{"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":"8.0.0-20250815165020-c8d66301415d"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-j6gg-r5jc-47cm/GHSA-j6gg-r5jc-47cm.json"}},{"package":{"name":"github.com/mattermost/mattermost","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.3.2-0.20250815165020-c8d66301415d"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-j6gg-r5jc-47cm/GHSA-j6gg-r5jc-47cm.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.3.2-0.20250815165020-c8d66301415d"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-j6gg-r5jc-47cm/GHSA-j6gg-r5jc-47cm.json"}},{"package":{"name":"github.com/mattermost/mattermost-server/v5","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.3.2-0.20250815165020-c8d66301415d"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-j6gg-r5jc-47cm/GHSA-j6gg-r5jc-47cm.json"}},{"package":{"name":"github.com/mattermost/mattermost-server/v6","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server/v6"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.3.2-0.20250815165020-c8d66301415d"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-j6gg-r5jc-47cm/GHSA-j6gg-r5jc-47cm.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}