{"id":"CVE-2017-18893","aliases":["GHSA-887v-xh2x-47cm","GO-2026-4296"],"url":"https://o3.security/vulnerability/CVE-2017-18893","summary":"Mattermost Server is vulnerable to XSS through display name field","details":"An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. Display names allow XSS.","published":"2020-06-19T19:15:10.903Z","modified":"2026-08-27T08:18:54.769931Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.00685,"percentile":0.49541,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"4.0.5"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"4.1.1"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"4.2.0"}],"fix":{"url":"https://github.com/mattermost/mattermost/commit/2a4d88d07c5815deac103e109550d25338507151","label":"mattermost/mattermost@2a4d88d"},"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18893"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/2a4d88d07c5815deac103e109550d25338507151"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/670bfbf62686ebe9f2ab332733d851a62b6950b0"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/d0b42b9e527e93a61fd06a9b9106fc97067807e4"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T08:18:54.769931Z"}}