SUMMARY: An image resizing utility called timthumb.php is widely used by many WordPress themes. Google shows over 39 million results for the script name. If your WordPress theme is bundled with an unmodified timthumb.php as many commercial and free themes are, then you should immediately either remove it or edit it – read the original story and full info over at markmaunder.com
UPDATE: You can now check your WordPress site using this “Timthumb Vulnerability Scanner” plugin.
50 million of the world’s websites now use WordPress. This impressive and important milestone shows just how successful and powerful WordPress really is. Read more over at WP Candy.