{"id":"CVE-2025-12756","aliases":["GHSA-p6gj-jc38-x2m7","GO-2025-4172"],"url":"https://o3.security/vulnerability/CVE-2025-12756","summary":"Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion","details":"Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.","published":"2025-12-01T19:51:46.289Z","modified":"2026-08-12T03:51:19.576740600Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","fixedVersion":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","fixedVersion":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","fixedVersion":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/12xxx/CVE-2025-12756.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-12756"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:19.576740600Z"}}