What is a Content Security Policy (CSP)? | UpGuard

This article explains Content Security Policy (CSP): what it is, how to implement it via HTTP headers or meta tags, key directives and example headers, and how to test and report policy violations. It highlights common configuration issues (missing CSP, unsafe-inline, unsafe-eval, insecure sources), recommends best practices such as using default-src 'self', avoiding unsafe directives, enabling report-only mode and reporting endpoints, and suggests scanning or monitoring to detect and remediate CSP problems.