{"schema_version":"1.7.3","id":"GHSA-424h-xj87-m937","published":"2025-10-16T09:30:24Z","modified":"2025-11-05T19:57:40.443090Z","aliases":["CVE-2025-10545","GO-2025-4030"],"summary":"Mattermost has an Incorrect Authorization vulnerability","details":"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","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":"8.0.0-20250820115038-ff30b84049f0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-424h-xj87-m937/GHSA-424h-xj87-m937.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":"10.5.11"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-424h-xj87-m937/GHSA-424h-xj87-m937.json"}},{"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":"10.11.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-424h-xj87-m937/GHSA-424h-xj87-m937.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-10545"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/31319"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/33827"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/fb9c583f5e466a566a5122154ef337bbf2238902"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/ff30b84049f0193f0570d30e46cffc3602298c67"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"database_specific":{"cwe_ids":["CWE-863"],"github_reviewed":true,"github_reviewed_at":"2025-10-16T20:59:09Z","nvd_published_at":"2025-10-16T09:15:33Z","severity":"LOW"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}