Secunia Security Advisory – A vulnerability has been reported in the Calendar Base (cal) extension for TYPO3, which can be exploited by malicious people to conduct cross-site scripting attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75456/sa34155.txt
Source: https://packetstormsecurity.com/files/75456/Secunia-Security-Advisory-34155.html