{"action":"Upgrade github.com/mattermost/mattermost-server to 3.5.1+incompatible or later.","affected":[{"fixed":"3.5.1+incompatible","introduced":"0"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2016-11063"],"ecosystem":"Go","epss":0.0069,"exploited":false,"fixed_versions":["3.5.1+incompatible"],"ghsa_id":"GHSA-cffj-7w5c-jqjh","id":"tcs_01M5KGB5PYZBSF6Y1RJ1HTX771","modified_at":"2026-03-03T04:57:01.753925Z","published_at":"2025-10-30T15:02:33Z","references":["https://osv.dev/vulnerability/GO-2025-4045","https://github.com/advisories/GHSA-cffj-7w5c-jqjh","https://nvd.nist.gov/vuln/detail/CVE-2016-11063","https://github.com/mattermost/mattermost","https://github.com/mattermost/mattermost/commit/48533aa483879a19fdd2c1e09c596aa6c028d439","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"GO-2025-4045","url":"https://osv.dev/vulnerability/GO-2025-4045"},{"source":"nvd","source_id":"CVE-2016-11063","url":"https://nvd.nist.gov/vuln/detail/CVE-2016-11063"}],"summary":"Mattermost Server vulnerable to Cross-site Scripting through file preview feature in github.com/mattermost/mattermost-server"}