{"action":"Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20251015091448-abbf01b9db45 or later.","affected":[{"fixed":"8.0.0-20251015091448-abbf01b9db45","introduced":"0"}],"component":"github.com/mattermost/mattermost/server/v8","cve_ids":["CVE-2025-12559"],"ecosystem":"Go","epss":0.00232,"exploited":false,"fixed_versions":["8.0.0-20251015091448-abbf01b9db45"],"ghsa_id":"GHSA-4g87-9x45-cx2h","id":"tcs_01M5KEWJRXE6H1VBYPC9WWM99K","modified_at":"2025-12-15T21:11:17.085319Z","published_at":"2025-11-27T18:30:25Z","references":["https://osv.dev/vulnerability/GHSA-4g87-9x45-cx2h","https://nvd.nist.gov/vuln/detail/CVE-2025-12559","https://github.com/mattermost/mattermost/pull/34110","https://github.com/mattermost/mattermost/commit/5d8719042c1807da59ac8a821624eb01152d8495","https://github.com/mattermost/mattermost/commit/649aee8fa9184ca59bd66022a33b8f8918e413aa","https://github.com/mattermost/mattermost/commit/7ccb62db7958abd6a4b21a06c5a4f5367a8f8b1f","https://github.com/mattermost/mattermost/commit/9f54e5cdc3aef412945ff0e6a58338f7b549bdda","https://github.com/mattermost/mattermost/commit/abbf01b9db45d1850eaf3701ea8362b910193ffd","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GHSA-4g87-9x45-cx2h","url":"https://osv.dev/vulnerability/GHSA-4g87-9x45-cx2h"}],"summary":"Mattermost fails to sanitize team email addresses"}