#XSS

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.

From injection and broken auth to XSS and the newest threats — OWASP Top 10 broken down with real code examples and practical mitigations for each vulnerability.

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.