The security quest is divided into two parts, one more offensive, and an open question. When do you feel like, please send the answers to the contact link.
A well known and discussed vulnerability is present on this site, find it and tell us how to exploit it.
Security tries to avoid future attacks, and because of that, this site can be improved. How would you do it? What changes should be implemented? Tells us on simple bullet points what can be done.