Web Application Exploits and Defenses is an educational codelab developed by Bruce Leban, Mugdha Bendre, and Parisa Tabriz that provides hands-on learning about web application security vulnerabilities and their corresponding defensive measures. The codelab covers multiple categories of web application security issues including Cross-Site Scripting (XSS) attacks, Cross-Site Request Forgery (XSRF) vulnerabilities, client-state manipulation techniques, denial of service attacks, code execution vulnerabilities, and configuration-related security weaknesses. Additionally, the resource addresses AJAX-specific vulnerabilities and demonstrates practical exploitation techniques alongside defensive strategies. The codelab format allows users to interact with real examples of vulnerable code and learn how to implement proper security controls. The educational material is designed to help developers, security professionals, and students understand both the offensive and defensive aspects of web application security through practical demonstrations and exercises.