{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"github.com/mattermost/mattermost-server/v5","cve_ids":["CVE-2025-3228"],"ecosystem":"Go","epss":0.00294,"exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-4578-6gjh-f2jm","id":"tcs_01M5KG92JVVTC29N301SH672RB","modified_at":"2026-03-03T04:57:20.979939Z","published_at":"2025-07-28T19:57:13Z","references":["https://osv.dev/vulnerability/GO-2025-3771","https://github.com/advisories/GHSA-4578-6gjh-f2jm","https://nvd.nist.gov/vuln/detail/CVE-2025-3228","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GO-2025-3771#Go/github.com/mattermost/mattermost-server/v5","url":"https://osv.dev/vulnerability/GO-2025-3771"},{"source":"nvd","source_id":"CVE-2025-3228","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-3228"}],"summary":"Mattermost allows an unauthorized Guest user access to Playbook in github.com/mattermost/mattermost-server"}