{"action":"Upgrade github.com/mattermost/mattermost-server to 3.9.2+incompatible or later.","affected":[{"fixed":"3.9.2+incompatible","introduced":"0"},{"fixed":"3.10.2+incompatible","introduced":"3.10.0+incompatible"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2017-18904"],"ecosystem":"Go","epss":0.0069,"exploited":false,"fixed_versions":["3.9.2+incompatible","3.10.2+incompatible"],"ghsa_id":"GHSA-8pff-p3gx-w4jf","id":"tcs_01M5KGCZ6Y6D338RHENX8X7T8Z","modified_at":"2026-03-03T04:57:53.378340Z","published_at":"2026-01-13T16:42:40Z","references":["https://osv.dev/vulnerability/GO-2026-4302","https://github.com/advisories/GHSA-8pff-p3gx-w4jf","https://nvd.nist.gov/vuln/detail/CVE-2017-18904","https://github.com/mattermost/mattermost/commit/6a2754376c8c8270be5e11e3fdab589659d0cc8d","https://github.com/mattermost/mattermost/commit/bde06a7bc3a03a56da224c1ffcd8bffb0af8071b","https://github.com/mattermost/mattermost/commit/f06c5bef4d78966c60b153bbec6eea4ec0be9e68","https://mattermost.com/security-updates"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"GO-2026-4302","url":"https://osv.dev/vulnerability/GO-2026-4302"}],"summary":"Mattermost Server vulnerable to XSS via an uploaded file in github.com/mattermost/mattermost-server"}