Secunia Security Advisory – Ubuntu has issued an update for mozilla-thunderbird. This fixes some vulnerabilities, which can be exploited by malicious people to bypass certain security restrictions, conduct cross-site scripting attacks, and potentially compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/52445/sa23013.txt
Source: https://packetstormsecurity.com/files/52445/Secunia-Security-Advisory-23013.html