To prevent Cross-Site Request Forgery, we have removed the third party TYPO3 t3_quixplorer extension from the websites of customers who had this installed. This extension was only available for users with administration rights and is not required for maintaining or operating the websites. More information on this issue is available on the TYPO3 Security Bulletin . If you want to upgrade your TYPO3 website to the latest version or add new features, please contact us .