{"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-2017-18892"],"ecosystem":"Go","epss":0.0069,"exploited":false,"fixed_versions":["4.0.5+incompatible","4.1.1+incompatible","4.2.0+incompatible"],"ghsa_id":"GHSA-wj5w-qghh-gvqp","id":"tcs_01M5KGD2ECW2VNT6334C141817","modified_at":"2026-03-03T04:57:51.379056Z","published_at":"2026-01-23T02:28:11Z","references":["https://osv.dev/vulnerability/GO-2026-4317","https://github.com/advisories/GHSA-wj5w-qghh-gvqp","https://nvd.nist.gov/vuln/detail/CVE-2017-18892","https://github.com/mattermost/mattermost/commit/4e05fbffed4d7ad75c0bb55d67d2c6f7cf9eaad6","https://github.com/mattermost/mattermost/commit/d76946bdb545aba4088943fc523dabb459d22873","https://github.com/mattermost/mattermost/commit/f5167f3ba645b829f4c28530e13be6c3db967255","https://mattermost.com/security-updates"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"GO-2026-4317","url":"https://osv.dev/vulnerability/GO-2026-4317"}],"summary":"Mattermost Server does not neutralize HTML content in an Email template field in github.com/mattermost/mattermost-server"}