{"action":"Upgrade concrete5/concrete5 to 8.5.21 or later.","affected":[{"fixed":"8.5.21","introduced":"0"},{"fixed":"9.4.3","introduced":"9.0.0RC1"}],"component":"concrete5/concrete5","cve_ids":["CVE-2025-8571"],"ecosystem":"Packagist","epss":0.00383,"exploited":false,"fixed_versions":["8.5.21","9.4.3"],"ghsa_id":"GHSA-4pcg-pjp5-3mc6","id":"tcs_01M5KEV67RSRF9TE4YP5VD6VW8","modified_at":"2025-08-06T17:42:17.710482Z","published_at":"2025-08-06T00:30:25Z","references":["https://osv.dev/vulnerability/GHSA-4pcg-pjp5-3mc6","https://nvd.nist.gov/vuln/detail/CVE-2025-8571","https://github.com/concretecms/concretecms/commit/4b39dcc17c309dc82eb8398e8cdb146942f62f92","https://github.com/concretecms/concretecms/commit/f7630b467d3a234d3d333ca117046a500e7ee2b6","https://documentation.concretecms.org/9-x/developers/introduction/version-history/943-release-notes","https://documentation.concretecms.org/developers/introduction/version-history/8521-release-notes","https://github.com/concretecms/concretecms","https://www.concretecms.org/download"],"severity":{"label":"medium","score":4.8},"sources":[{"source":"osv","source_id":"GHSA-4pcg-pjp5-3mc6","url":"https://osv.dev/vulnerability/GHSA-4pcg-pjp5-3mc6"},{"source":"nvd","source_id":"CVE-2025-8571","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-8571"}],"summary":"Concrete CMS vulnerable to Reflected Cross-Site Scripting (XSS) in Conversation Messages Dashboard Page"}