Don't use this for anything you view as important. I just checked and there is no collision detection for usernames. You can signup for an account using any name and your account will seemingly just replace the previous created account. That is a big enough and obvious enough flaw that it also makes we wonder if this is just a phishing expedition or a way to mine email addresses.
I just fixed it. It was a change I did last night to fix a save bug. My apologies about that, it wasn't a good bug, but hopefully it's the last security-related one. Probably goes without saying, but this is definitely a beta project. I'm doing a lot of other things to protect this kind of attack (filename scrubbing, bcrypt passwords), so I'm pretty red in the face about how dumb this one was. If you find any other b…
Guaranteed not.
I don't mean for you in particular, security requires constant vigilance.