SMRTR ProgrammingFeb 11, 2025Dev.to

Content Security Policy: Your Website's Unsung Hero

SMRTR summary

Content Security Policy (CSP) is a web security feature that acts as a browser firewall, protecting against cross-site scripting (XSS) attacks by controlling webpage resource loading. CSP uses directives like default-src, script-src, and style-src to whitelist trusted content sources.

Best practices include starting with default-src 'self', testing in report-only mode, and avoiding unsafe options. Implementing CSP reduces a website's attack surface and enhances user protection against malicious content.

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