Fix your WordPress install
Via Shelley Powers, there’s a must-install WordPress Update:
WordPress users, upgrade to today’s WordPress security release immediately. This fixes a vulnerability that is ‘in the wild’–examples of how to exploit can be easily found and just as easily exploited.This is not a “We’ll sit around and think about it” update. This is a “Take the steak off the bar-b-que, Joe, and put the margaritas back in the jug! We’ve got work to do!” service release.
Done here – do the same if you’re running WP.