{"action":"Upgrade github.com/mattermost/mattermost-server to 9.11.6+incompatible or later.","affected":[{"fixed":"9.11.6+incompatible","introduced":"9.11.0+incompatible"},{"fixed":"10.0.4+incompatible","introduced":"10.0.0+incompatible"},{"fixed":"10.1.4+incompatible","introduced":"10.1.0+incompatible"},{"fixed":"10.2.1+incompatible","introduced":"10.2.0+incompatible"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2025-20086"],"ecosystem":"Go","epss":0.00446,"exploited":false,"fixed_versions":["9.11.6+incompatible","10.0.4+incompatible","10.1.4+incompatible","10.2.1+incompatible"],"ghsa_id":"GHSA-5m7j-6gc4-ff5g","id":"tcs_01M5KG6PDJFPQ5YW70AH3V8X4T","modified_at":"2026-02-04T03:28:02.836322Z","published_at":"2025-01-16T21:58:23Z","references":["https://osv.dev/vulnerability/GO-2025-3392","https://github.com/advisories/GHSA-5m7j-6gc4-ff5g","https://nvd.nist.gov/vuln/detail/CVE-2025-20086","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GO-2025-3392","url":"https://osv.dev/vulnerability/GO-2025-3392"},{"source":"nvd","source_id":"CVE-2025-20086","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-20086"}],"summary":"Mattermost fails to properly validate post props in github.com/mattermost/mattermost-server"}