{"id":"GHSA-424h-xj87-m937","revision":"6363fd2994794a119d7bcd1f184c9af6","records":[{"revision":"6363fd2994794a119d7bcd1f184c9af6","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-424h-xj87-m937","aliases":["CVE-2025-10545","GO-2025-4030"],"title":"Mattermost has an Incorrect Authorization vulnerability","description":"Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the `/api/v4/channels/{channel_id}/members` endpoint","state":0,"publishedAt":"2025-10-16T09:30:24+00:00","modifiedAt":"2025-11-05T19:57:40.44309+00:00","affected":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"8.0.0-20250820115038-ff30b84049f0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.5.0"},{"kind":"fixed","version":"10.5.11"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.11.0"},{"kind":"fixed","version":"10.11.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"LOW"}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2025-10545","https://github.com/mattermost/mattermost/pull/31319","https://github.com/mattermost/mattermost/pull/33827","https://github.com/mattermost/mattermost/commit/fb9c583f5e466a566a5122154ef337bbf2238902","https://github.com/mattermost/mattermost/commit/ff30b84049f0193f0570d30e46cffc3602298c67","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"sourceUrl":"https://github.com/advisories/GHSA-424h-xj87-m937","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-424h-xj87-m937","identifiers":["GHSA-424h-xj87-m937","CVE-2025-10545","GO-2025-4030"]},"retained":false,"historicalAffected":[]}],"coverage":[]}