Mozilla Thunderbird users should be aware of a recently published update. The group released version 22.214.171.124 of the e-mail client today, for Windows and Mac, to address some potential security flaws. Only two of them were rated as critical
, and one would only be of concern if you use Thunderbird as a newsreader.
The most dangerous of the plugged holes was a buffer overflow involving UTF-8 URLs, which could theoretically be used to compromise a system through the use of maliciously crafted URLs in messages. Some other minor issues have been corrected as well. You can get the update here