{"cve":"CVE-2025-12756","nvd":{"published":"2025-12-01T20:15:49.147","modified":"2026-10-19T13:10:00.110","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-863"],"references":["https://mattermost.com/security-updates"],"products":["mattermost:mattermost_server"],"source":"nvd","synced_at":"2026-10-19T22:16:02.354564667+00:00"},"epss":{"cve":"CVE-2025-12756","score":0.00182,"percentile":0.07751,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-p6gj-jc38-x2m7","url":"https://osv.dev/vulnerability/GHSA-p6gj-jc38-x2m7","summary":"Mattermost fails to validate user permissions when deleting comments in Boards","modified":"2025-12-03T19:43:25.608785Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":["<=8.0.0-20251013062617-7977e7e6dae3"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":[">=10.11.0 <=10.11.4"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":[">=10.12.0 <=10.12.1"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":[">=10.5.0 <=10.5.12"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":[">=11.0.0 <=11.0.2"],"fixed":[]}]},{"id":"GO-2025-4172","url":"https://osv.dev/vulnerability/GO-2025-4172","summary":"Mattermost fails to validate user permissions when deleting comments in Boards in github.com/mattermost/mattermost","modified":"2026-03-03T04:57:44.033496Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":[">=10.5.0+incompatible"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":[">=10.11.0+incompatible"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":[">=10.12.0+incompatible"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v5","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v6","purl":"pkg:golang/github.com/mattermost/mattermost-server/v6","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}