http://www.dds6qkxpwdeubwucdiaord2xgbbeyds25rbsgr73tbfpqpt4a6vjwsyd.onion/w/index.php?title=Dev/VirtualBox&curid=6793&oldid=83657
This is a theoretical concern and does not have any practical implications at present, since Whonix in VirtualBox is actually more secure than running Tor, Tor Browser or torified applications on the host in many cases; see Whonix Security in the Real World .