Security exploit in WordPress 2.1.1

Looks like a hacker managed to sneak an exploit into the WordPress 2.1.1 blogging software. If you downloaded it within the past few days your files may include a security exploit that was added by a cracker, and you should upgrade all of your files to version 2.1.2 immediately. Thankfully for me, I update all my WordPress installs via Subversion, which is unaffected.