{"action":"Upgrade concrete5/concrete5 to 9.5.1 or later.","affected":[{"fixed":"9.5.1","introduced":"9.0.0RC.1"}],"component":"concrete5/concrete5","cve_ids":["CVE-2026-8353"],"ecosystem":"Packagist","epss":0.00149,"exploited":false,"fixed_versions":["9.5.1"],"ghsa_id":"GHSA-q9fm-mpg8-8jqm","id":"tcs_01M5KF75EWYGKBT528M518T1K4","modified_at":"2026-09-10T03:50:47.219534769Z","published_at":"2026-05-26T13:30:17Z","references":["https://osv.dev/vulnerability/GHSA-q9fm-mpg8-8jqm","https://nvd.nist.gov/vuln/detail/CVE-2026-8353","https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes","https://github.com/concretecms/concretecms"],"severity":{"label":"low"},"sources":[{"source":"osv","source_id":"GHSA-q9fm-mpg8-8jqm","url":"https://osv.dev/vulnerability/GHSA-q9fm-mpg8-8jqm"}],"summary":"Concrete CMS is vulnerable to Stored XSS via page name in the Atomik theme"}