Since TimThumb is used by many commercial and free themes makers, this exploit easily effects thousands of sites.
Fix: Check your timthumb.php file , usually within one of your theme’s subdirectory’s the version number is in the file under
Download latest timthumb.php from the link below and replace if if your version is below 1.25.
Exploit Type: XSS , DoS.
Version: TimThumb 1.24