{"id":"CVE-2017-18915","aliases":["GHSA-hxxj-8phw-74vw","GO-2026-4462"],"url":"https://o3.security/vulnerability/CVE-2017-18915","summary":"Mattermost Server server restarts may provide attackers with API access","details":"An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. After a restart of a server, an attacker might suddenly gain API Endpoint access.","published":"2020-06-19T20:15:12.413Z","modified":"2026-07-31T18:30:32.803404660Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.01175,"percentile":0.64677,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"3.6.7-0.20170420152529-0968e4079e0a"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"3.7.5"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"3.8.2"}],"fix":{"url":"https://github.com/mattermost/mattermost/commit/0968e4079e0aa670254f3fe3a7248d126e3cf877","label":"mattermost/mattermost@0968e40"},"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18915"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/0968e4079e0aa670254f3fe3a7248d126e3cf877"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/c7bdce8a6641ed8d361a43b6004a351535c78423"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/fb325cc339eb8d8efb60dbadc48fd38897201c6f"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-31T18:30:32.803404660Z"}}