Improper Input Validation
Unrestricted file upload vulnerability in upload.php in Elkagroup Image Gallery 1.0 allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension, then accessing it via a direct request to the file in gallery/pictures/. NOTE: some of these details are obtained from third party information.
CWE-20 - 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.