Defending Web Applications Against XSS and Iframe Injection

Web applications must be carefully secured to prevent attackers from executing unauthorized scripts or displaying deceptive interfaces. This course provides a clear, foundational look at how Cross-Site Scripting (XSS) and iframe injection vulnerabilities occur, and how to defend against them. You will understand the underlying mechanics of these risks to better protect user interfaces and sensitive credentials. What you'll learn: Understand the core concepts of the Document Object Model (DOM) and script execution boundaries; Analyze how unauthorized content injection can mimic trusted application interfaces; Configure robust Content Security Policies to restrict unauthorized frames and scripts; Apply proper output encoding and input validation to eliminate injection vectors; Implement modern browser security headers and secure cookie attributes. The course begins with essential web security definitions and browser security models before walking through defensive configurations and secure coding standards. This program is designed for beginner developers and security-minded professionals who want to build a solid foundation in web defense. Start learning how to secure your applications against injection threats today.