{"id":"CVE-2025-55073","aliases":["GHSA-ff85-qw3h-g9vp","GO-2025-4129"],"url":"https://o3.security/vulnerability/CVE-2025-55073","summary":"MS Teams plugin OAuth allows editing arbitrary posts","details":"Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 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.","published":"2025-11-14T08:03:16.922Z","modified":"2026-10-28T02:30:30.808005506Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"10.11.4"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"10.5.12"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"10.12.1"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"8.0.0-20250929212932-a41db04d2746"}],"fix":{"url":"https://github.com/mattermost/mattermost/commit/375ce229f4923205394d8f27925372b2cbf28130","label":"mattermost/mattermost@375ce22"},"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55073.json"},{"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:30.808005506Z"}}