{"action":"Upgrade github.com/mattermost/mattermost-server to 4.1.2+incompatible or later.","affected":[{"fixed":"4.1.2+incompatible","introduced":"0"},{"fixed":"4.2.1+incompatible","introduced":"4.2.0-rc1+incompatible"},{"fixed":"4.3.0+incompatible","introduced":"4.3.0-rc1+incompatible"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2017-18885"],"ecosystem":"Go","epss":0.01184,"exploited":false,"fixed_versions":["4.1.2+incompatible","4.2.1+incompatible","4.3.0+incompatible"],"ghsa_id":"GHSA-g78f-6xq7-rrhq","id":"tcs_01M5KGC7J76HHACV6ZYPF6YCDE","modified_at":"2026-03-03T04:57:46.399048Z","published_at":"2025-12-15T19:37:35Z","references":["https://osv.dev/vulnerability/GO-2025-4200","https://github.com/advisories/GHSA-g78f-6xq7-rrhq","https://nvd.nist.gov/vuln/detail/CVE-2017-18885","https://mattermost.com/security-updates"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"GO-2025-4200","url":"https://osv.dev/vulnerability/GO-2025-4200"}],"summary":"Mattermost Server allows attackers to gain privileges by accessing unintended API endpoints with users' credentials in github.com/mattermost/mattermost-server"}