{"id":"CVE-2017-18896","aliases":["GHSA-63wg-qmrv-7q66","GO-2026-4299"],"url":"https://o3.security/vulnerability/CVE-2017-18896","summary":"Mattermost Server allows attackers to log sensitive information via DEBUG REST API logging endpoint","details":"An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. It allows attackers to add DEBUG lines to the logs via a REST API version 3 logging endpoint.","published":"2020-06-19T19:15:11.247Z","modified":"2026-10-24T10:30:58.714007785Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"epss":{"score":0.00769,"percentile":0.53904,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"4.1.1"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"4.0.5"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"4.2.0"}],"fix":{"url":"https://github.com/mattermost/mattermost/commit/3c34e2b2dcb0fde96a10e68d877aa7d0ab511669","label":"mattermost/mattermost@3c34e2b"},"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18896"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/3c34e2b2dcb0fde96a10e68d877aa7d0ab511669"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/722fb1947a2e7395ccf16adce9206736d803a9f3"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/d38328976e2c8bb0fab91e656042a0d8ac37bc76"},{"type":"WEB","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T10:30:58.714007785Z"}}