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...

CVE-2026-8417: Cross-Site Request Forgery (CSRF)

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 name...

CVE-2026-8428: Cross-Site Request Forgery (CSRF)

Concrete CMS 9.5.0 and below emits a CSRF token in the localavailableupdate.php view $token-output'doupdate' but the corresponding doupdate method in concrete/controllers/singlepage/dashboard/system/update/update.php never calls $this-token-validate'doupdate'. The form is rendered as a POST form,...