The Front End User Registration (sr_feuser_register) extension before 2.6.2 for TYPO3 allows remote attackers to obtain user names and passwords via the (1) edit perspective or (2) autologin feature.
Frontend User Registration (sr_feuser_register) extension 2.5.20 and earlier for TYPO3 does not properly verify access rights, which allows remote authenticated users to obtain sensitive information such as passwords via unknown attack vectors.