I've just been contacted by a customer where I had installed FEC v 1.51 to include the checkout w/o account. He received a call from one of his retail customer's that they found that they could login to their account with only their email address. No password was needed!!
Of course I immediately thought it was a cookie, but it's not. Anyone that has previously registered to the site can merely enter their email address and hit login and they are in!!! (Password field left blank).
Now I've disabled the entire FEC and it is still happening, so something somewhere in the checkout modifications has really messed this up and I have no clue where to look.
I need to fix this ASAP as you can imagine and I don't know where to start. Can someone give me a clue what to look for?
Really stressed here on this one.
