Secunia Security Advisory – Some vulnerabilities have been reported in the sr_feuser_register extension for TYPO3, which can be exploited by malicious people to conduct cross-site scripting attacks or compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/66427/sa30275.txt
Source: https://packetstormsecurity.com/files/66427/Secunia-Security-Advisory-30275.html