Import any XML, CSV or Excel File to WordPress <= 3.9.3 - Authenticated (Admin+) Limited Unsafe File Upload

The Import any XML, CSV or Excel File to WordPress plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the import functionality in all versions up to, and including, 3.9.3. This makes it possible for authenticated attackers, with Administrator-level access and above, to upload unsafe files like .phar files on the affected site's server which may make remote code execution possible.