{"id":"CVE-2017-18874","aliases":["GHSA-8qg8-c7mw-6fj7","GO-2025-4148"],"url":"https://o3.security/vulnerability/CVE-2017-18874","summary":"Mattermost Server is vulnerable to Directory Traversal by System Admins","details":"An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can achieve directory traversal.","published":"2020-06-19T19:15:09.950Z","modified":"2026-07-31T18:30:25.298400431Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"4.1.2-0.20171004201910-6be8113eb60"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"4.2.1-0.20171004194140-6d3cb2ce07fc"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"4.3.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-31T18:30:25.298400431Z"}}