API SECURITY

API Security Testing

Secure the backbone of your applications — REST, GraphQL, and SOAP

Why API Security Testing Matters

APIs are the backbone of modern applications — and they're increasingly the primary target for attackers. Misconfigured endpoints, broken authorization logic, and excessive data exposure in APIs have been responsible for some of the largest and most costly data breaches in recent years.

Unlike web application testing, API testing requires a deep understanding of how data flows between services, how authentication tokens are issued and validated, and how business logic can be abused through automated requests. CyberHex performs thorough manual API security assessments to map your entire API attack surface and uncover exploitable vulnerabilities before they become incidents.

What We Test

Broken Object Level Authorization (BOLA / IDOR) — accessing other users' resources

Broken Authentication — weak token validation, JWT algorithm confusion, API key exposure

Excessive Data Exposure — endpoints returning more data than necessary

Lack of Rate Limiting — brute force, credential stuffing, resource exhaustion

Broken Function Level Authorization — accessing admin endpoints as regular user

Mass Assignment — binding request parameters to internal object properties

Security Misconfiguration — verbose errors, open CORS, unnecessary HTTP methods

Injection through API parameters (SQL, NoSQL, command injection)

GraphQL-specific attacks (introspection abuse, batching attacks, DoS)

API versioning risks and deprecated endpoint exposure

Business logic abuse through automated API calls

Webhook security and callback URL manipulation

REST APIGraphQLSOAP / WSDLWebSocketgRPC

Standards & Frameworks

OWASP API Security Top 10

What You Receive

Endpoint inventory map

Risk-rated findings with proof-of-concept

Remediation guide for each vulnerability

Optional re-testing after fixes

Ready to Fortify Your
Digital Infrastructure?

Get a professional penetration test and discover your vulnerabilities before attackers do. We deliver real-world attack simulations with actionable remediation guidance.

Schedule a Free Consultation