Vulnarex | Elite Cybersecurity Learning Platform

#A Systematic Approach to API Penetration Testing#link

Professional API security testing follows a structured methodology. Improvising without a checklist leads to missed vulnerabilities and incomplete reports.

Phase 1: Reconnaissance & Mapping

Discover all API endpoints. Look for Swagger/OpenAPI docs at /swagger.json, /api-docs, /openapi.yaml. Use Burp's crawler, JS file analysis, and Google dorking.

Phase 2: Authentication Testing

Test JWT weaknesses (alg:none, weak secrets), API key leakage, OAuth misconfigurations, and password reset flows.

Phase 3: Authorization Testing

For every endpoint, test BOLA (switch IDs), BFLA (switch roles/functions), and mass assignment (add admin:true to request bodies).

Phase 4: Input Validation

Test all input fields for SQL injection, NoSQL injection, command injection, XSS in stored fields, and XXE in XML-accepting endpoints.

callout

✅ Always document every endpoint found, every test performed, and every finding with full request/response evidence. Reproducibility is what separates a professional pentest report from amateur notes.

quiz BLOCK (★ 50 XP)

What is the first step in a systematic API security test?

Select your proof vectors above

Building an API Security Testing Methodology