Web Security Essentials: XSS, XXE, and Insecure Deserialization

Even as global security standards evolve, certain core vulnerabilities remain persistent threats to web applications. Understanding the technical roots of these risks is essential for any aspiring security professional or developer who wants to build resilient software. This course provides a deep dive into the mechanics of vulnerabilities that continue to shape the threat landscape today. You will gain a thorough understanding of how specific risks like Cross-Site Scripting and Insecure Deserialization operate, enabling you to recognize dangerous patterns and implement robust defenses in your own projects. By the end of the text-based lessons, you will be able to evaluate application code for common flaws and apply modern security best practices to protect sensitive data. What you'll learn: - Understand the fundamental principles of web security and the evolution of the OWASP framework. - Identify and mitigate Cross-Site Scripting (XSS) vulnerabilities in modern web interfaces. - Analyze XML External Entities (XXE) to prevent unauthorized data exposure and server-side risks. - Secure applications against Insecure Deserialization by implementing safe data handling practices. - Apply modern defensive strategies, including Content Security Policies (CSP) and strict input validation. - Practice identifying these risks through detailed written scenarios and code-based examples. The course begins with foundational security terminology and basic concepts before moving into detailed technical explorations of specific vulnerability types and modern remediation strategies. This course is designed for beginners interested in web security and developers looking to strengthen their defensive coding skills; no prior security experience is required. Start building a more secure digital landscape by understanding these essential web vulnerabilities.