MLdonkey (up to 2.9.7) has a vulnerability that allows remote user to access any
file with rights of running Mldonkey daemon by supplying a
special-crafted request (ok, there's not much special about double
slash) to an Mldonkey http GUI (tcp/4080 usually).
Thus, the exploit would be as simple as accessing any file on a remote
host with your browser and double slash:
Be aware MLdonkey users... or just watch your files