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Cyber Defence
Web Security

API Security Testing Complete Guide

Step-by-Step Guide to Testing APIs for Security Vulnerabilities

What is API Security Testing?

API Security Testing is a critical discipline in modern cybersecurity that focuses on identifying vulnerabilities in Application Programming Interfaces (APIs). As organizations increasingly rely on APIs to connect services, securing these interfaces has become paramount.

Common API Vulnerabilities

BOLA/IDOR

Broken Object Level Authorization allows accessing resources by manipulating object identifiers.

Broken Authentication

Weak authentication mechanisms enable unauthorized access.

Excessive Data Exposure

APIs expose more data than necessary.

Injection

SQL, NoSQL, Command injection through unvalidated input.

Essential Tools

Burp Suite
HTTP proxy and vulnerability scanning
Postman
API development and testing
OWASP ZAP
Open source web app scanner