Secunia Security Advisory – Debian has issued an update for squirrelmail. This fixes some vulnerabilities, which can be exploited by malicious users to manipulate certain information and by malicious people to conduct cross-site scripting attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/44518/sa19176.txt
Source: https://packetstormsecurity.com/files/44518/Secunia-Security-Advisory-19176.html