Secunia Security Advisory – Debian has issued an update for horde3. This fixes some vulnerabilities, which can be exploited by malicious people to conduct script insertion attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/41778/sa17599.txt
Source: https://packetstormsecurity.com/files/41778/Secunia-Security-Advisory-17599.html