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react-security

Prevent XSS, secure auth flows, and harden React client-side applications. Use when preventing XSS, securing auth flows, or auditing third-party dependencies in React.

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包含的文件(3)

  • SKILL.md2.3 KB
  • evals/evals.json1.9 KB
  • references/REFERENCE.md4.2 KB

SKILL.md(原文)

安装前可以查看交给 AI 代理的指令内容。

React Security

Priority: P0 (CRITICAL)

Prevent XSS Attacks

  • Never use dangerouslySetInnerHTML without sanitization. Use DOMPurify.sanitize(input) for all user-provided HTML.
  • Avoid javascript: protocols in href or src.

See implementation examples for DOMPurify sanitization and secure cookie configuration.

Secure Authentication

  • Store JWT/Sessions in HttpOnly and Secure cookies to prevent theft via XSS. Never store secrets in localStorage or in built JS bundle.
  • Data Flow: Escape all serialized state if injecting into HTML (e.g., in SSR). Use Content Security Policy (CSP) to restrict script sources and prevent inline execution.

Harden Application Boundaries

  • CSRF Protection: Use CSRF tokens for state-changing requests (PUT/POST/DELETE). Implement SameSite=Strict cookies where applicable.
  • Input Sanitization: Always validate and sanitize user inputs on backend. Frontend validation for UX only.
  • Dependency Management: Run npm audit / pnpm audit regularly. Pin specific dependency versions and use npm-check-updates.
  • Security Headers: Ensure server sends X-Frame-Options: DENY, X-Content-Type-Options: nosniff, and Permissions-Policy.

Anti-Patterns

  • No eval(): RCE risk.
  • No Serialized State: Don't inject JSON into DOM without escaping.
  • No Client Logic for Permissions: Backend must validate.

References

See references/REFERENCE.md for DOMPurify usage, CSP headers, OAuth2/JWT auth patterns, and CSRF protection.

Canonical response anchors

When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:

  • Pin specific dependency versions

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