XVWA is an intentionally vulnerable web application built with PHP and MySQL designed for security education and training purposes. The application contains multiple security vulnerabilities that allow users to practice identifying and exploiting common web application security issues in a controlled environment. Key vulnerabilities included in XVWA: - SQL Injection and Error-Based SQL Injection - Blind OS Command Injection - XPATH Injection and Formula Injection - PHP Object Injection - Unrestricted File Upload - Cross-Site Scripting (Reflected, Stored, and DOM-Based) - Server-Side Request Forgery (SSRF) including Cross-Site Port Attacks - File Inclusion vulnerabilities - Session management issues - Insecure Direct Object Reference - Missing Functional Level Access Control - Cross-Site Request Forgery (CSRF) - Cryptography implementation flaws The application is specifically designed to be "extremely vulnerable" and should only be deployed in local or controlled environments for educational purposes. It serves as a hands-on learning platform for security enthusiasts to develop application security skills using various testing tools and techniques.