These are my slides from the presentation I gave at LugRadio Live 2009 at Wolverhampton. The presentation was a brief tour of some common security issues you might come across developing web applications. I also covered ReDOS which is a lot less well known but an interesting vulnerability.
The notes are available on slideshare.net
I've had to pull the presentation from slideshare.net temporarily - I'll re-upload as soon as possible The problem at slideshare has now been resolved.