{"id":"GO-2025-4190","summary":"Mattermost Server is vulnerable to XSS attacks against an OAuth 2.0 allow/deny page in github.com/mattermost/mattermost-server","details":"Mattermost Server is vulnerable to XSS attacks against an OAuth 2.0 allow/deny page in github.com/mattermost/mattermost-server","aliases":["CVE-2017-18877","GHSA-9x8x-w6g5-hx4w"],"modified":"2026-03-03T04:57:45.560872Z","published":"2025-12-08T21:31:36Z","database_specific":{"review_status":"UNREVIEWED","url":"https://pkg.go.dev/vuln/GO-2025-4190"},"references":[{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-9x8x-w6g5-hx4w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18877"},{"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":"0"},{"fixed":"4.1.2+incompatible"},{"introduced":"4.2.0+incompatible"},{"fixed":"4.2.1+incompatible"},{"introduced":"4.3.0-rc1+incompatible"},{"fixed":"4.3.0+incompatible"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2025-4190.json"}}],"schema_version":"1.7.3"}