Risk: High
At the beginning of March, it was discovered that an attacker had modified the download file of the latest version of blogging software WordPress.
The issue came to light in an email to WordPress and after immediately investigating the issue, WordPress discovered that user-level access had been gained by a cracker, who modified the WordPress 2.1.1 download file, adding two files that could facilitate remote PHP execution.
Although it appears that not all version 2.1.1 downloads were affected, WordPress has released version 2.1.2, which includes minor updates as well as verified files, and has urged all users to upgrade to it.
More information is available on the WordPress site at:
http://wordpress.org/development/2007/03/upgrade-212/