{"action":"Upgrade github.com/mattermost/mattermost-server to 4.0.5+incompatible or later.","affected":[{"fixed":"4.0.5+incompatible","introduced":"0"},{"fixed":"4.1.1+incompatible","introduced":"4.1.0+incompatible"},{"fixed":"4.2.0+incompatible","introduced":"4.2.0-rc1+incompatible"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2017-18893"],"ecosystem":"Go","epss":0.0069,"exploited":false,"fixed_versions":["4.0.5+incompatible","4.1.1+incompatible","4.2.0+incompatible"],"ghsa_id":"GHSA-887v-xh2x-47cm","id":"tcs_01M5KGCY0F41S6EP4FR9T6MRX1","modified_at":"2026-03-03T04:57:52.148121Z","published_at":"2026-01-13T16:42:40Z","references":["https://osv.dev/vulnerability/GO-2026-4296","https://github.com/advisories/GHSA-887v-xh2x-47cm","https://nvd.nist.gov/vuln/detail/CVE-2017-18893","https://github.com/mattermost/mattermost/commit/2a4d88d07c5815deac103e109550d25338507151","https://github.com/mattermost/mattermost/commit/670bfbf62686ebe9f2ab332733d851a62b6950b0","https://github.com/mattermost/mattermost/commit/d0b42b9e527e93a61fd06a9b9106fc97067807e4","https://mattermost.com/security-updates"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"GO-2026-4296","url":"https://osv.dev/vulnerability/GO-2026-4296"}],"summary":"Mattermost Server is vulnerable to XSS through display name field in github.com/mattermost/mattermost-server"}