Secunia Security Advisory – Debian has issued an update for horde3. This fixes some vulnerabilities, 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/47464/sa20672.txt
Source: https://packetstormsecurity.com/files/47464/Secunia-Security-Advisory-20672.html