{"id":"CVE-2017-18917","aliases":["GHSA-jxc4-w54c-qv5r","GO-2026-4463"],"url":"https://o3.security/vulnerability/CVE-2017-18917","summary":"Mattermost Server uses weak hashing for OAuth, email verification tokens and invitations","details":"An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. Weak hashing was used for e-mail invitations, OAuth, and e-mail verification tokens.","published":"2020-06-19T20:15:12.523Z","modified":"2026-10-24T10:30:54.456319987Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":{"score":0.00711,"percentile":0.50505,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"3.7.5-0.20170421192444-247cd1e51a8c"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"3.8.2"}],"fix":{"url":"https://github.com/mattermost/mattermost/commit/247cd1e51a8c943628dc650e87e794b06aad4c2b","label":"mattermost/mattermost@247cd1e"},"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18917"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/247cd1e51a8c943628dc650e87e794b06aad4c2b"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/b74e85653660525d351d090a1e1874ae933bcbc8"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T10:30:54.456319987Z"}}