CVE-2026-81897 Concrete CMS below version 9.5.3 is vulnerable to Stored XSS via Express form Text control save_control

In Concrete CMS below CMS 9.5.3, the savecontrol action in the Express entities forms dashboard controller did not validate the anti-CSRF token. By causing an authenticated administrator to submit a forged cross-site request, a remote attacker without credentials could write attacker-controlled...