Content Security Policy (CSP) is a security feature that helps protect websites from header exploits and cross-site scripting (XSS) vulnerabilities by controlling which sources a browser can load resources from. By allowing web developers to specify trusted domains for different resource types, CSP provides an additional layer of defense against potential attacks. However, CSP does not prevent HTML injection or data leakage, and it requires careful implementation to avoid common bypass techniques such as callback exploits and misuse of content delivery networks (CDNs). Inline scripts and functions like eval pose vulnerabilities unless properly managed, and developers are advised to avoid enabling unsafe-inline and unsafe-eval features. To ensure proper CSP implementation, developers can use attributes like report-uri and report-to for generating reports on blocked activities, helping to identify policy misconfigurations or ongoing attacks. Throughout its deployment, CSP must be applied universally across all pages, including error pages, to prevent bypass attempts. Automated tools like Detectify can assist in scanning for vulnerabilities in response headers and help maintain robust web security.