{"action":"Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20250314142426-c049748b8863 or later.","affected":[{"fixed":"10.5.2","introduced":"10.5.0"},{"fixed":"9.11.10","introduced":"9.11.0"},{"fixed":"8.0.0-20250314142426-c049748b8863","introduced":"0"}],"component":"github.com/mattermost/mattermost/server/v8","cve_ids":["CVE-2025-27538"],"ecosystem":"Go","epss":0.00244,"exploited":false,"fixed_versions":["10.5.2","9.11.10","8.0.0-20250314142426-c049748b8863"],"ghsa_id":"GHSA-j5jw-m2ph-3jjf","id":"tcs_01M5KFDH2W71SBA76J20CQWHAG","modified_at":"2026-09-10T03:50:57.281887077Z","published_at":"2025-04-16T09:32:13Z","references":["https://osv.dev/vulnerability/GHSA-j5jw-m2ph-3jjf","https://nvd.nist.gov/vuln/detail/CVE-2025-27538","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates","https://pkg.go.dev/vuln/GO-2025-3620"],"severity":{"label":"low","score":2.2},"sources":[{"source":"osv","source_id":"GHSA-j5jw-m2ph-3jjf","url":"https://osv.dev/vulnerability/GHSA-j5jw-m2ph-3jjf"}],"summary":"Mattermost Missing Authentication for Critical Function"}