{"action":"Upgrade github.com/mattermost/mattermost-server to 4.1.2-0.20171004201910-6be8113eb60c or later.","affected":[{"fixed":"4.1.2-0.20171004201910-6be8113eb60c","introduced":"0"},{"fixed":"4.2.1-0.20171004192657-8fbbd688ea24","introduced":"4.2.0-rc1"},{"fixed":"4.3.0","introduced":"4.3.0-rc1"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2017-18878"],"ecosystem":"Go","epss":0.00777,"exploited":false,"fixed_versions":["4.1.2-0.20171004201910-6be8113eb60c","4.2.1-0.20171004192657-8fbbd688ea24","4.3.0"],"ghsa_id":"GHSA-h564-6gc2-fcc6","id":"tcs_01M5KFBXR818WSVRFB5EX0P38M","modified_at":"2025-12-15T21:11:13.725259Z","published_at":"2022-05-24T17:21:03Z","references":["https://osv.dev/vulnerability/GHSA-h564-6gc2-fcc6","https://nvd.nist.gov/vuln/detail/CVE-2017-18878","https://github.com/mattermost/mattermost/commit/6be8113eb60cf5ddd2dc1c3f4db05cae0c183086","https://github.com/mattermost/mattermost/commit/8fbbd688ea2466dd0d70e9c07e9703d78f8a19a5","https://github.com/mattermost/mattermost/commit/affd35071ea155069979fd359726296de8aa6aaf","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GHSA-h564-6gc2-fcc6","url":"https://osv.dev/vulnerability/GHSA-h564-6gc2-fcc6"}],"summary":"Mattermost Server allows users with a session ID to revoke another users' session"}