How to Use Claude for Security Audit
The exact prompt, setup, and codes to get great results.
The Problem
Security vulnerabilities hide in code that 'works fine.' Most teams don't have a dedicated security engineer, so OWASP Top 10 issues slip into production unnoticed.
The Prompt (Copy & Paste)
Perform a security audit on this code. Application type: [WEB APP / API / MOBILE BACKEND] Language/Framework: [LANGUAGE + FRAMEWORK] Auth method: [HOW USERS AUTHENTICATE] Data sensitivity: [WHAT SENSITIVE DATA DOES IT HANDLE] Code: ```[language] [PASTE CODE — FOCUS ON AUTH, INPUT HANDLING, DATA ACCESS] ``` Audit for: 1. **Injection** (SQL, NoSQL, command, LDAP) 2. **Authentication flaws** (weak sessions, missing MFA considerations, credential storage) 3. **Authorization** (IDOR, privilege escalation, missing checks) 4. **Data exposure** (PII in logs, overly broad API responses, missing encryption) 5. **Input validation** (XSS, CSRF, file upload, rate limiting) 6. **Dependencies** (known CVEs, outdated packages) 7. **Configuration** (debug mode, default credentials, CORS) Format each finding as: - Severity: Critical / High / Medium / Low - Location: File and line - Issue: What's wrong - Impact: What an attacker could do - Fix: Specific code change
Replace the [BRACKETED] placeholders with your specific details.
What You Get
A structured security report with severity ratings and specific fixes for each vulnerability. Findings are prioritized so you fix the critical issues first.
Prompt Codes That Help
Add these prefix codes to the start of your prompt for even better results:
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