CVE-2026-8417

Concrete CMS 9.5.0 and below does not validate a CSRF token before processing requests to /dashboard/extend/update/doupdate/. The doupdate method in concrete/controllers/singlepage/dashboard/extend/update.php checks only canInstallPackages before executing upgradeCoreData and upgrade on the named...

CVE-2026-8417

Concrete CMS 9.5.0 and earlier is vulnerable to CSRF in the do_update() handler for package upgrades. The endpoint /dashboard/extend/update/do_update/ is invoked via a state-changing GET request and only checks canInstallPackages() before calling upgradeCoreData() and upgrade() on the target pack...