{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0","last_affected":"5.39.3"}],"component":"github.com/mattermost/mattermost-server/v5","cve_ids":["CVE-2025-49222"],"ecosystem":"Go","epss":0.00301,"exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-q453-638c-h4mr","id":"tcs_01M5KFJ8RFNFS5AKKN5VRV9536","modified_at":"2025-08-29T20:58:14Z","published_at":"2025-08-21T09:30:21Z","references":["https://osv.dev/vulnerability/GHSA-q453-638c-h4mr","https://nvd.nist.gov/vuln/detail/CVE-2025-49222","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates","https://pkg.go.dev/vuln/GO-2025-3904"],"severity":{"label":"medium","score":6.8},"sources":[{"source":"osv","source_id":"GHSA-q453-638c-h4mr#Go/github.com/mattermost/mattermost-server/v5","url":"https://osv.dev/vulnerability/GHSA-q453-638c-h4mr"}],"summary":"Mattermost Fails to Validate Remote Cluster Upload Sessions"}