Incomplete blacklist vulnerability in the FileUploadsFilter class in protected/components/filters/FileUploadsFilter.php in X2Engine X2CRM before 5.0.9 allows remote authenticated users to execute arbitrary PHP code by uploading a file with a .pht extension.
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.