phpThumb.php in phpThumb() 1.7.9 and possibly other versions, when ImageMagick is installed, allows remote attackers to execute arbitrary commands via the fltr[] parameter, as discovered in the wild in April 2010. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.