{"schema_version":"1.7.3","id":"GHSA-fcwg-45jh-5qhf","published":"2022-05-24T17:21:06Z","modified":"2026-02-26T18:56:14.893765Z","aliases":["CVE-2017-18903","GO-2026-4305"],"summary":"Mattermost Server vulnerable to CSRF if CORS is enabled","details":"An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. CSRF can occur if CORS is enabled.","affected":[{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.9.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-fcwg-45jh-5qhf/GHSA-fcwg-45jh-5qhf.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.10.0-rc1"},{"fixed":"3.10.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-fcwg-45jh-5qhf/GHSA-fcwg-45jh-5qhf.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18903"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/312269ad0bd166174f07f9df7391fce714601600"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/4519b03d95e8bfe1b2f74094673ae1a2f39f6b47"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/a18479df0940be8503c9b88993490741793eba9e"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"database_specific":{"cwe_ids":["CWE-352"],"github_reviewed":true,"github_reviewed_at":"2026-01-12T20:17:23Z","nvd_published_at":"2020-06-19T19:15:00Z","severity":"HIGH"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}