While most security reviews in Web3 focus on smart contracts, decentralized applications (dApps) also rely heavily on traditional Web2 components such as JavaScript/TypeScript frontends, Python or Node.js backends, and API services. A Web2 code audit reviews these off-chain components for security flaws.
What a Web2 Code Audit Covers
Frontend applications
Secure use of wallet integrations (Metamask, WalletConnect, etc.)
Handling of transaction construction logic
Prevention of client-side vulnerabilities (e.g., XSS, unsafe eval, DOM injection)
APIs and backend services
Authentication and session management
Data validation and sanitization
Secure API design and rate-limiting
Dependency and package security
Insecure npm/pip packages
Typosquatted or malicious libraries
Unmaintained dependencies with known CVEs
Secret and key management
API keys and private keys exposed in code or .env files
