Unless you're living under a rock, you should have heard of the Common Weakness Enumeration (CWE)/SANS top 25 list. The second annual list was released some time ago and is always worth a read. The guys over at the application security street fighter blog is honouring this years list with a run down of the vulnerabilities and applicable solutions. As usual it's a no nonsense approach to describing the problem and solutions without going too far in depth. I would recommend this blog to any developer, so go have a read...right now :) Number #1 is cross site scripting (XSS),
http://blogs.sans.org/appsecstreetfighter/
http://blogs.sans.org/appsecstreetfighter/
