Explore the critical role of Content Security Policy (CSP) in enhancing web application security during this 40-minute conference talk from PHP UK Conference 2018. Gain insights into mitigating Cross-Site Scripting vulnerabilities through a live demonstration of an intentionally vulnerable web application. Discover real-world success stories of companies implementing CSP, and learn about common bypasses and additional security benefits, including protection against clickjacking, HTTPS migration, and secure form submissions. Equip yourself with essential knowledge to develop more secure web applications in an era of increasing online threats and fraud.