{"action":"Upgrade github.com/mattermost/mattermost-server to 4.1.2 or later.","affected":[{"fixed":"4.1.2","introduced":"0"},{"fixed":"4.2.1","introduced":"4.2.0-rc1"},{"fixed":"4.3.0","introduced":"4.3.0-rc1"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2017-18884"],"ecosystem":"Go","epss":0.00813,"exploited":false,"fixed_versions":["4.1.2","4.2.1","4.3.0"],"ghsa_id":"GHSA-876j-jfqf-m7j7","id":"tcs_01M5KF398C2MPB82PEFM2FW2WP","modified_at":"2025-12-09T17:57:23.684357Z","published_at":"2022-05-24T17:21:04Z","references":["https://osv.dev/vulnerability/GHSA-876j-jfqf-m7j7","https://nvd.nist.gov/vuln/detail/CVE-2017-18884","https://mattermost.com/security-updates"],"severity":{"label":"critical"},"sources":[{"source":"osv","source_id":"GHSA-876j-jfqf-m7j7","url":"https://osv.dev/vulnerability/GHSA-876j-jfqf-m7j7"}],"summary":"Mattermost Server exposes OAuth personal access tokens to attackers"}