{"action":"Upgrade github.com/mattermost/mattermost-server to 9.11.18+incompatible or later.","affected":[{"fixed":"9.11.18+incompatible","introduced":"9.11.0+incompatible"},{"fixed":"10.5.9+incompatible","introduced":"10.5.0+incompatible"},{"fixed":"10.8.4+incompatible","introduced":"10.8.0+incompatible"},{"fixed":"10.9.3+incompatible","introduced":"10.9.0+incompatible"},{"fixed":"10.10.1+incompatible","introduced":"10.10.0+incompatible"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2025-49222"],"ecosystem":"Go","epss":0.00301,"exploited":false,"fixed_versions":["9.11.18+incompatible","10.5.9+incompatible","10.8.4+incompatible","10.9.3+incompatible","10.10.1+incompatible"],"ghsa_id":"GHSA-q453-638c-h4mr","id":"tcs_01M5KG9ZPQN70NQ8N4S7FWT18K","modified_at":"2026-03-03T04:56:51.728076Z","published_at":"2025-08-29T14:52:20Z","references":["https://osv.dev/vulnerability/GO-2025-3904","https://github.com/advisories/GHSA-q453-638c-h4mr","https://nvd.nist.gov/vuln/detail/CVE-2025-49222","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":6.8},"sources":[{"source":"osv","source_id":"GO-2025-3904","url":"https://osv.dev/vulnerability/GO-2025-3904"},{"source":"nvd","source_id":"CVE-2025-49222","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-49222"}],"summary":"Mattermost Fails to Validate Remote Cluster Upload Sessions in github.com/mattermost/mattermost-server"}