{"id":"GO-2026-4459","summary":"Mattermost Server vulnerable to XSS through channel headers in github.com/mattermost/mattermost-server","details":"Mattermost Server vulnerable to XSS through channel headers in github.com/mattermost/mattermost-server.\n\nNOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.\n\n(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)\n\nThe additional affected modules and versions are: github.com/mattermost/mattermost-server before v3.9.2-0.20170714014920-312269ad0bd1.","aliases":["CVE-2017-18907","GHSA-42x9-rr3c-gr59"],"modified":"2026-03-17T05:07:51.288792Z","published":"2026-02-17T18:09:06Z","database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-4459","review_status":"UNREVIEWED"},"references":[{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-42x9-rr3c-gr59"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18907"},{"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":"WEB","url":"https://mattermost.com/security-updates"}],"affected":[{"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+incompatible"},{"fixed":"3.10.2+incompatible"}]}],"ecosystem_specific":{"custom_ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.9.2-0.20170714014920-312269ad0bd1"}]}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4459.json"}}],"schema_version":"1.7.5"}