Karune announced this some time ago, all Warcraft III players should read this entirely, the thread in the link as well: Now he bumped the thread, stating that this is still not fixed. I would also like to reccomend: check if it downloads anything when playing an existhing map. It is fairly easy to just alter an existing map with this exploit, and start a regular game with it under the original map name. Read the rest in the battle.net thread. Also contains details on what the exploit does, and how to avoid it.
That's what I thought. Blizzard goes Adobe. Secuirity issues in their, erm, documents. I expected that they got pretty much all of the secuirity flaws out, and now this. Good thing that it has been a while since my account connected. I wonder if it still exists.