Understanding and Preventing Cross-Site Request Forgery

Web application security relies on ensuring that every request executed on behalf of a user is intentional. Cross-Site Request Forgery (CSRF) exploits authentication mechanisms by tricking logged-in users into submitting unintended actions. This written course provides a thorough introduction to web request security, helping you recognize CSRF attack vectors and implement practical defensive measures. What you will learn: Understand core web security terminology, HTTP session states, and authentication flow fundamentals. Analyze the underlying mechanics of CSRF attacks and how unauthorized requests are triggered. Implement synchronized anti-CSRF token patterns across forms and API endpoints. Configure modern SameSite cookie flags to restrict cross-site credential sharing. Evaluate incoming requests using Origin, Referer, and Sec-Fetch HTTP headers. Apply secure coding practices to safeguard web applications against state-changing exploits. The course begins with foundational concepts, defining key security terms and web request mechanics before walking through detailed written explanations and defensive code patterns. Designed for beginner web developers and software enthusiasts, no prior security experience is required. Start reading today to strengthen your web application security knowledge.