Secunia Security Advisory – Ubuntu has issued an update for thunderbird. This fixes some vulnerabilities, which can be exploited by malicious people to conduct cross-site scripting and spoofing attacks, bypass certain security restrictions, disclose sensitive information, or potentially compromise a user’s system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/68514/sa31220.txt
Source: https://packetstormsecurity.com/files/68514/Secunia-Security-Advisory-31220.html