XSS attacks have been around for a long time now but many developers still don't understand what they are, how to prevent them and how devastating they can be - especially when chained with other types of attack. In this preso we'll take you through the basics, show the different types of XSS attacks and the numerous ways they can occur, demonstrate how to protect your own sites and applications before showing a theoretical example of how XSS could be leveraged to completely compromise an application and server.