Unrestricted file upload vulnerability in admin/files/add in AdaptCMS 3.0.3 allows remote authenticated users to execute arbitrary PHP code by uploading a file with a PHP extension, then accessing it via a direct request to the file in /app/webroot/uploads.
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.