{"action":"Upgrade github.com/mattermost/mattermost-server to 9.11.12+incompatible or later.","affected":[{"fixed":"9.11.12+incompatible","introduced":"9.11.0+incompatible"},{"fixed":"10.5.3+incompatible","introduced":"10.5.0+incompatible"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2025-2527"],"ecosystem":"Go","epss":0.00314,"exploited":false,"fixed_versions":["9.11.12+incompatible","10.5.3+incompatible"],"ghsa_id":"GHSA-h356-3mfw-x368","id":"tcs_01M5KG8GHWCVJSTCFCK0D9BPPN","modified_at":"2026-03-03T04:57:16.873172Z","published_at":"2025-05-23T15:17:19Z","references":["https://osv.dev/vulnerability/GO-2025-3691","https://github.com/advisories/GHSA-h356-3mfw-x368","https://nvd.nist.gov/vuln/detail/CVE-2025-2527","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GO-2025-3691","url":"https://osv.dev/vulnerability/GO-2025-3691"},{"source":"nvd","source_id":"CVE-2025-2527","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-2527"}],"summary":"Mattermost Fails to Verify User's Permissions When Accessing Groups in github.com/mattermost/mattermost-server"}