{"id":"CVE-2017-18901","aliases":["GHSA-c253-8hr4-r8v9","GO-2026-4304"],"url":"https://o3.security/vulnerability/CVE-2017-18901","summary":"Mattermost Server exposes private team invite ID ","details":"An issue was discovered in Mattermost Server before 4.1.0, 4.0.4, and 3.10.3. It allows attackers to discover a team invite ID by requesting a JSON document.","published":"2020-06-19T19:15:11.577Z","modified":"2026-07-31T18:30:12.382596328Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.0092,"percentile":0.58284,"asOf":"2026-09-13"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"3.10.3"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"4.0.4"}],"fix":{"url":"https://github.com/mattermost/mattermost/commit/5e822a7d09214d5446d54e02a0611df8e64f3aa5","label":"mattermost/mattermost@5e822a7"},"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18901"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/5e822a7d09214d5446d54e02a0611df8e64f3aa5"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/638c38cc0d2296335a0fbd5bde8b6d2cbf9f9062"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/a78ed923f1c73ae5551893374fb9803ee2f4c8e6"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-31T18:30:12.382596328Z"}}