Western Digital Mycloud Pr4100
An issue in the web administration component allows for multipart upload functionality to be accessible without authentication. This is specifically related to the "/web/jquery/uploader/multi uploadify.php" endpoint, which can be used to place a file anywhere on the device's file system. As a result, an attacker can upload a PHP shell onto the device and obtain arbitrary code execution as root. The vulnerability is related to deficiencies in the authentication procedure of the web interface.