Web applications are the front door to most organizations, exposing them to attacks that may disclose personal information, execute fraudulent transactions, or compromise ordinary users. This practical book has been completely updated and revised to discuss the latest step-by-step techniques for attacking and defending the range of ever-evolving web applications. You’ll explore the various new technologies employed in web applications that have appeared since the first edition and review the new attack techniques that have been developed, particularly in relation to the client side. The book starts with the current state of web application security and the trends that indicate how it is likely to evolve soon. You’ll examine the core security problem affecting web applications and the defence mechanisms that applications implement to address this problem, and you’ll also explore the key technologies used in today’s web application. Next, you’ll carry out tasks for breaking into web applications and for executing a comprehensive attack. As you progress, you’ll learn to find vulnerabilities in an application’s source code and review the tools that can help when you hack web applications. You’ll also study a detailed methodology for performing a comprehensive and deep attack against a specific target. By the end of this book, you’ll be able to discover security flaws in web applications and how to deal with them.