{"id":"GHSA-ff85-qw3h-g9vp","summary":"Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL","details":"Mattermost versions 10.11.x \u003c= 10.11.3, 10.5.x \u003c= 10.5.11, 10.12.x \u003c= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.","aliases":["CVE-2025-55073","GO-2025-4129"],"modified":"2025-11-18T16:12:39.884943Z","published":"2025-11-14T09:30:27Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2025-11-17T17:58:31Z","nvd_published_at":"2025-11-14T08:15:45Z","cwe_ids":["CWE-306"],"severity":"MODERATE"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-55073"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/375ce229f4923205394d8f27925372b2cbf28130"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/6c288aa62bb3343183ec1d0a06360d14aa0193e9"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/a41db04d2746ab549d056db4ede4cd803f64989c"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/b822cea06bf5683a176e2c92711241bd29cd9389"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/e47349ea0fc072ee1dfb196d9bb1c8fd1a589224"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"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-ff85-qw3h-g9vp/GHSA-ff85-qw3h-g9vp.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-ff85-qw3h-g9vp/GHSA-ff85-qw3h-g9vp.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"10.12.0"},{"fixed":"10.12.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-ff85-qw3h-g9vp/GHSA-ff85-qw3h-g9vp.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":"8.0.0-20250929212932-a41db04d2746"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-ff85-qw3h-g9vp/GHSA-ff85-qw3h-g9vp.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:N/I:L/A:L"}]}