Secunia Security Advisory – Debian has issued an update for webcalendar. This fixes a vulnerability, which can be exploited by malicious people to bypass certain security restrictions and disclose sensitive information.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/47320/sa20542.txt
Source: https://packetstormsecurity.com/files/47320/Secunia-Security-Advisory-20542.html