I previously posted on testing your host/network penetrating testing skills. There are several projects whose purpose is to provide exploitable web applications to test different different security flaws.

Here’s what I’ve come up with so far:

Mutillidae: A Deliberately Vulnerable Set Of PHP Scripts That Implement The OWASP Top 10

OWASP WebGoat: deliberately insecure J2EE web application

Damn Vulnerable Web App: PHP/MySQL web application that is damn vulnerable

Samurai Web Testing Framework: live linux environment that has been pre-configured to function as a web pen-testing environment

Moth: VMware image with a set of vulnerable Web Applications and scripts

Hacme Bank: simulates a “real-world” web services-enabled online banking application
Hacme Books: representative of real-world J2EE scenarios
Hacme Casino: extensible online casino platform is written using Ruby on Rails

Mutillidae: A Deliberately Vulnerable Set Of PHP Scripts That Implement The OWASP Top 10