Secunia Security Advisory – Debian has issued an update for webcalendar. This fixes a vulnerability, which can be exploited by malicious people to compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/55106/sa24519.txt
Source: https://packetstormsecurity.com/files/55106/Secunia-Security-Advisory-24519.html