Implementing Content Security Policy for Web Security

Cross-Site Scripting (XSS) remains one of the most common and dangerous vulnerabilities on the modern web. Implementing a robust Content Security Policy (CSP) is your strongest defense, allowing you to control exactly which resources your application is allowed to load and execute.\n\nThrough this text-based course, you will transition from understanding basic web security concepts to confidently deploying a strong, modern CSP. You will explore how to analyze application vulnerabilities, define precise security directives, and safely roll out policy changes without breaking your site's functionality.\n\nWhat you'll learn:\n- Understand the core principles of web security and how Content Security Policy mitigates XSS attacks.\n- Configure essential CSP directives for scripts, styles, images, and connections.\n- Implement advanced modern security patterns using nonces, hashes, and the strict-dynamic directive.\n- Analyze existing web applications to identify resource dependencies and potential security gaps.\n- Deploy CSP safely using report-only mode and modern Reporting APIs to monitor violations in real-time.\n- Refactor inline scripts and legacy code to align with secure, modern web standards.\n\nThe course begins with fundamental web security concepts and terminology before guiding you through step-by-step written scenarios where you will construct, test, and refine a secure policy for a vulnerable application.\n\nThis course is designed for web developers, security enthusiasts, and systems administrators who are new to web application security. No prior security experience is required, though a basic understanding of HTML and web browser mechanics will be helpful.\n\nStart building a safer web presence and protect your users today.