Apple appears to have made the error of sacrificing security for usability on iPhone running OS 3.
Two security experts, Lothar Gramelspacher and Max Moser, revealed high risk behaviour when using the aforementioned on local networks (WLAN).
According to Max’s blog things like this could happen:
Usability kills security …. together with karmetasploit its a very evil thing. Get Iphones cookies, accounts and maybe even system control… depending on the bugs you have left to test.
Here’s even a video to illustrate:
Lesson to learn – Be careful what you join!