{"action":"Upgrade github.com/mattermost/mattermost-server to 3.9.2-0.20170714134023-b17fca0d5ee7 or later.","affected":[{"fixed":"3.9.2-0.20170714134023-b17fca0d5ee7","introduced":"0"},{"fixed":"3.10.2","introduced":"3.10.0"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2017-18906"],"ecosystem":"Go","epss":0.00789,"exploited":false,"fixed_versions":["3.9.2-0.20170714134023-b17fca0d5ee7","3.10.2"],"ghsa_id":"GHSA-fpcr-4rr5-hpcp","id":"tcs_01M5KF9J88V4232FMAV61MGXD0","modified_at":"2026-02-19T20:41:01.127939Z","published_at":"2022-05-24T17:21:06Z","references":["https://osv.dev/vulnerability/GHSA-fpcr-4rr5-hpcp","https://nvd.nist.gov/vuln/detail/CVE-2017-18906","https://github.com/mattermost/mattermost/commit/259ad46f30d0fac2f7c5c14f3b76b2170f7e90c7","https://github.com/mattermost/mattermost/commit/b17fca0d5ee7557e3df1cf1d1da8bd749859e35f","https://github.com/mattermost/mattermost/commit/fbc170733e86f09b46ba754dd03304733d2f482f","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"GHSA-fpcr-4rr5-hpcp","url":"https://osv.dev/vulnerability/GHSA-fpcr-4rr5-hpcp"}],"summary":"Mattermost Server vulnerable to user account takeover when Single Sign-On OAuth2 is used"}