Winmail Server through 6.2 allows remote code execution by authenticated users who leverage directory traversal in a netdisk.php copy_folder_file call (in inc/class.ftpfolder.php) to move a .php file from the FTP folder into a web folder.
Winmail Server 6.1 allows remote code execution by authenticated users who leverage directory traversal in a netdisk.php move_folder_file call to move a .php file from the FTP folder into a web folder.