Unrestricted file upload vulnerability in asys/site/files.php in Adminsystems CMS before 4.0.2 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 upload/files/.
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.