#CSP

CSP is the last line of defense that stops XSS scripts from executing even if injected. Directive syntax, nonce approach, Next.js config, and a safe rollout strategy — all covered.

I found my website running inside an iframe on a shady domain. I dive deep into 6 essential security headers (HSTS, X-Frame-Options, CSP, Permissions-Policy, etc.) to stop Clickjacking and XSS, with implementation guides for Nginx and Next.js.

My admin account was hijacked because of a single comment on the board. I dive deep into the 3 types of XSS (Stored, Reflected, DOM) and concrete defense strategies in React/Next.js environments, including HTML Escaping, CSP, and Cookie Security.