An origin validation error in TYPO3 CMS allows for CSRF attacks, potentially enabling unauthorized actions to be performed on behalf of an authenticated user.

This vulnerability involves an origin validation error (CWE-346) and Cross-Site Request Forgery (CWE-352). The referrer enforcement mechanism, intended to prevent unauthorized cross-site requests, fails in these versions, allowing an attacker to manipulate an authenticated user into performing unintended actions.

The inability to properly validate the origin of requests exposes the application to CSRF attacks, which can lead to unauthorized configuration changes or data submission. With a CVSS score of 7.3, this flaw poses a high risk to application integrity, particularly for administrative users who may be tricked into performing sensitive operations.

Immediate Action: Update TYPO3 CMS to version 13.4.34 or 14.3.6, or the latest available maintenance release, to restore proper referrer enforcement.

Proactive Monitoring: Monitor server access logs for suspicious request patterns and verify that security headers are correctly implemented to prevent unauthorized cross-site interactions.

Compensating Controls: Implement strict SameSite cookie attributes and consider the use of a Web Application Firewall (WAF) to filter suspicious incoming traffic that lacks valid referrer headers.

Public Exploit Available: No

The failure of referrer enforcement in current TYPO3 versions represents a critical security regression. Organizations should prioritize updating to the patched versions immediately to ensure that origin validation is restored and the application is protected against CSRF-based attacks.