{"schema_version":"1.7.3","id":"GHSA-h564-6gc2-fcc6","published":"2022-05-24T17:21:03Z","modified":"2025-12-15T21:11:13.725259Z","aliases":["CVE-2017-18878","GO-2025-4191"],"summary":"Mattermost Server allows users with a session ID to revoke another users' session","details":"An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. Knowledge of a session ID allows revoking another user's session.","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":"4.1.2-0.20171004201910-6be8113eb60c"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-h564-6gc2-fcc6/GHSA-h564-6gc2-fcc6.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.2.0-rc1"},{"fixed":"4.2.1-0.20171004192657-8fbbd688ea24"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-h564-6gc2-fcc6/GHSA-h564-6gc2-fcc6.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.3.0-rc1"},{"fixed":"4.3.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-h564-6gc2-fcc6/GHSA-h564-6gc2-fcc6.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18878"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/6be8113eb60cf5ddd2dc1c3f4db05cae0c183086"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/8fbbd688ea2466dd0d70e9c07e9703d78f8a19a5"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/affd35071ea155069979fd359726296de8aa6aaf"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"database_specific":{"cwe_ids":["CWE-284","CWE-639","CWE-732"],"github_reviewed":true,"github_reviewed_at":"2025-12-05T15:11:20Z","nvd_published_at":"2020-06-19T19:15:00Z","severity":"MODERATE"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"}]}