{"cve":"CVE-2025-13352","nvd":{"published":"2025-12-17T13:15:56.627","modified":"2026-10-13T11:10:00.203","status":"Analyzed","description":"Mattermost versions 10.11.x <= 10.11.6 and Mattermost GitHub plugin versions <=2.4.0 fail to validate plugin bot identity in reaction forwarding which allows attackers to hijack the GitHub reaction feature to make users add reactions to arbitrary GitHub objects via crafted notification posts.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N","score":3.0},"cwes":["CWE-1287"],"references":["https://mattermost.com/security-updates"],"products":["mattermost:mattermost_server"],"source":"nvd","synced_at":"2026-10-19T22:17:07.138532058+00:00"},"epss":{"cve":"CVE-2025-13352","score":0.00175,"percentile":0.06878,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-jf5h-xfw4-p8gp","url":"https://osv.dev/vulnerability/GHSA-jf5h-xfw4-p8gp","summary":"Mattermost GitHub Plugin Bot Identity Validation Bypass Allows Arbitrary GitHub Reaction Injection","modified":"2025-12-22T18:41:54.450206Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":[">=10.11.0-rc1 <10.11.7-0.20251106103514-3b05384dd014"],"fixed":["10.11.7-0.20251106103514-3b05384dd014"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":["<10.11.7-0.20251106103514-3b05384dd014"],"fixed":["10.11.7-0.20251106103514-3b05384dd014"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":[">=11.0.0-alpha.1 <11.1.0"],"fixed":["11.1.0"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-plugin-github","purl":"pkg:golang/github.com/mattermost/mattermost-plugin-github","ranges":["<1.0.1-0.20250829075715-0deffcfc6bee"],"fixed":["1.0.1-0.20250829075715-0deffcfc6bee"]}]},{"id":"GO-2025-4247","url":"https://osv.dev/vulnerability/GO-2025-4247","summary":"Mattermost GitHub Plugin Bot Identity Validation Bypass Allows Arbitrary GitHub Reaction Injection in github.com/mattermost/mattermost","modified":"2026-03-03T04:57:49.160626Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":[">=11.0.0-alpha.1+incompatible <11.1.0+incompatible"],"fixed":["11.1.0+incompatible"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-plugin-github","purl":"pkg:golang/github.com/mattermost/mattermost-plugin-github","ranges":["<1.0.1-0.20250829075715-0deffcfc6bee"],"fixed":["1.0.1-0.20250829075715-0deffcfc6bee"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=10.11.0-rc1+incompatible"],"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."]}