Timthumb, a very favored way of cropping images have once again been found guilty of being easy to use to attack other websites or even crash them. It is therefore much suggested that you either stop using timthumb if you are a developer or that you specifically make use to stop the script from being misused. If you are uncertain if you are using timthumb and want to protect yourself then I suggest adding this line of code to your wp-config.php file.
define ('WEBSHOT_ENABLED', false);
As a wordpress developer I used to use timthumb. It created nice thumbnails with ease and it was very easy to work with. Then when you started checking the script out it put a bit of preassure on your webservers not to mention it being used to attack other websites. So it was a good idea, but not very well executed.
It will be interesting to see if this script will be redone, scraped or how things will progress.
Others have written about this as well.
So will you as readers start looking for a better script or will you do as me? Use WordPress own functionality for creating thumbnails?