{"action":"Upgrade github.com/mattermost/mattermost-server to 3.9.2-0.20170714014920-312269ad0bd1 or later.","affected":[{"fixed":"3.9.2-0.20170714014920-312269ad0bd1","introduced":"0"},{"fixed":"3.10.2","introduced":"3.10.0"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2017-18907"],"ecosystem":"Go","epss":0.0069,"exploited":false,"fixed_versions":["3.9.2-0.20170714014920-312269ad0bd1","3.10.2"],"ghsa_id":"GHSA-42x9-rr3c-gr59","id":"tcs_01M5KEVP4XJ24YKTQA9SEK6P9J","modified_at":"2026-02-19T20:41:02.522703Z","published_at":"2022-05-24T17:21:06Z","references":["https://osv.dev/vulnerability/GHSA-42x9-rr3c-gr59","https://nvd.nist.gov/vuln/detail/CVE-2017-18907","https://github.com/mattermost/mattermost/commit/312269ad0bd166174f07f9df7391fce714601600","https://github.com/mattermost/mattermost/commit/4519b03d95e8bfe1b2f74094673ae1a2f39f6b47","https://github.com/mattermost/mattermost/commit/a18479df0940be8503c9b88993490741793eba9e","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"GHSA-42x9-rr3c-gr59","url":"https://osv.dev/vulnerability/GHSA-42x9-rr3c-gr59"}],"summary":"Mattermost Server vulnerable to XSS through channel headers"}