Arie- Your username sanitization is broken, try changing your name to have < in the middleWhat happens? Is this a potential XSS issue? Has anyone changed name to <script>alert("hi");</script> yet?
From what I guessed off this comment, the site prevents you from using certain characters (i.e.: < and > would disappear when you submit)
There's still XSS potential if the HTML templates don't do any sanitization, which is possible if the dev just believes it's not a risk since it's "impossible" to submit something unsafe
EDIT: nvm from comment below it looks like a Yikes
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