Google is upping its game. They have launched a game to test developers' knowledge of cross site scripting (XSS) vulnerabilities.

The XSS Game consists of six games with increasing difficulty that required successful attacks against mock vulnerable web applications.

Google wrote on the game page: "The game is designed primarily for developers working on web applications who do not specialize in security."

"XSS bugs are common because they have a nasty habit of popping up wherever a web app deals with untrusted input.

"Our motivation is to highlight common coding patterns which lead to XSS to help you spot them in your code."

Give it a try.