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API Security Testing

Test REST & GraphQL APIs for IDOR, SSRF, token issues & escalation risks. Comprehensive API security assessments covering authentication bypasses, business logic flaws, and data exposure vulnerabilities.

Comprehensive API Security Assessment

Our API security testing services cover both REST and GraphQL APIs, focusing on identifying critical vulnerabilities that could lead to data breaches, privilege escalation, and business logic bypasses. We use advanced testing methodologies to uncover flaws that automated tools often miss.

Our API Security Testing Services:

Authentication & Authorization

JWT token manipulation, OAuth flow analysis, API key security, and session management vulnerabilities.

IDOR (Insecure Direct Object Reference)

Horizontal and vertical privilege escalation, object reference manipulation, and access control bypasses.

SSRF (Server-Side Request Forgery)

Internal service access, cloud metadata exploitation, and network reconnaissance through SSRF vulnerabilities.

Data Exposure & Injection

SQL injection, NoSQL injection, excessive data exposure, and sensitive information leakage.

API Testing Methodology:

1

API Discovery & Mapping

Comprehensive endpoint discovery and API documentation analysis

2

Authentication Analysis

Token security, session management, and authorization flow testing

3

Business Logic Testing

Workflow manipulation, rate limiting, and privilege escalation testing

4

Data Security Assessment

Input validation, output encoding, and sensitive data handling evaluation

Common API Vulnerabilities We Test For:

  • Broken Object Level Authorization (BOLA/IDOR)
  • Broken User Authentication mechanisms
  • Excessive Data Exposure in API responses
  • Lack of Resources & Rate Limiting
  • Broken Function Level Authorization
  • Mass Assignment vulnerabilities
  • Security Misconfiguration in API gateways
  • Injection attacks (SQL, NoSQL, Command)
  • Improper Assets Management
  • Insufficient Logging & Monitoring

REST API Security Testing:

HTTP Method Testing

Method overriding, verb tampering, and unintended method exposure

Parameter Manipulation

Query parameter injection, body parameter tampering, and hidden parameter discovery

Rate Limiting & Throttling

API abuse testing, rate limit bypasses, and resource exhaustion attacks

Content Type Manipulation

MIME type confusion, XML/JSON parsing issues, and content smuggling

GraphQL Security Testing:

Query Complexity Analysis

Deep query attacks, circular query detection, and resource exhaustion testing

Introspection Testing

Schema discovery, type enumeration, and information disclosure vulnerabilities

Authorization Bypasses

Field-level authorization, nested query bypasses, and resolver vulnerabilities

Mutation Testing

Data modification attacks, batch requests, and subscription vulnerabilities

Advanced Testing Techniques:

  • JWT token manipulation and algorithm confusion attacks
  • OAuth 2.0 flow exploitation and redirect URI manipulation
  • API versioning vulnerabilities and legacy endpoint exposure
  • CORS misconfiguration and cross-origin data access
  • WebSocket API security testing and message manipulation
  • Microservices communication security and service mesh vulnerabilities
  • API gateway bypasses and routing manipulation
  • Third-party API integration security and supply chain risks

Testing Tools & Frameworks:

Manual Testing Tools

Burp Suite Professional, OWASP ZAP, Postman, and custom testing scripts

Automated Scanners

Astra, InsightAPI, REST-Attacker, and GraphQL Voyager for comprehensive coverage

Custom Test Scripts

Python-based automation, Bash scripts, and API-specific payload generation

Performance Testing

Load testing integration, API performance impact assessment, and DoS testing

Key Benefits:

  • Identify 90%+ of critical API vulnerabilities before attackers do
  • Prevent data breaches through comprehensive authorization testing
  • Ensure compliance with API security best practices and standards
  • Reduce business risk from privilege escalation and data exposure
  • Get actionable remediation guidance with proof-of-concept exploits
  • Improve API design security through expert recommendations
  • Protect against automated attacks and credential stuffing
  • Build developer security awareness through detailed findings reports
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