First update all your iPads and iPhones to iOS 7.0.6.
Second NEVER connect to bank accounts etc when using a shared public network.
Third don't worry if you are on a private password protected or wired network where you know all the users on it.
The bug is an ugly, easy mistake in the code that allows a computer on your network to be recognized as a secure server so it could get the information sent out by you, if someone wanted to. Mostly this had been kept quiet and not exploited. But a good reminder to be careful where you access your important info.