Secunia Security Advisory – Several vulnerabilities have been reported in SquirrelMail, 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/38072/sa15721.txt
Source: https://packetstormsecurity.com/files/38072/Secunia-Security-Advisory-15721.html