API Penetration Testing

Websites and applications are becoming increasingly complex, requiring more API calls to meet the desired functionality. While this creates a great UX for customers, it also results in more pathways that malicious actors can use to access an environment. API Pentesting is critical for a modern security program. It helps security and development teams inventory their APIs, evaluate them for security vulnerabilities, and provide actionable recommendations for focused improvement to a company’s security posture.

Our API Penetration Testing Focuses On:

  • Attacking API authentication mechanism(s)  
  • Identifying access control weaknesses  
  • API server security configuration testing
  • Analyzing exposed information to identify excessive data exposure 
  • API endpoint fuzzing
  • Identifying server-side request forgery (SSRF) issues
  • Rate limiting functionality testing 
API Pentesting
API Pentesting

Our Approach to API Pentesting

  • Unauthenticated Testing

    Our team of offensive security specialists conducts comprehensive vulnerability scanning of target API(s) alongside manual testing and verification of exploitable and high-severity vulnerabilities. This test includes the network and system layers in addition to the application tier.

  • Authenticated Testing

    NetSPI applies business logic and sophisticated manual techniques to manipulate the API(s) in undesired or unexpected ways, including elevating user privilege, manipulating data, and gaining access to restricted functionality or data. We perform testing for each user type that exists, as well as targeting the OWASP Top 10 for API vulnerabilities, and application logic weaknesses. 

    After identifying the strengths and weaknesses of the API(s) and the processes behind API development and security programs, we’ll suggest strategies for improvement and assign priority to deficiencies. We’ll also collaborate with stakeholders so that notable findings may be compared against program goals and compliance requirements.

Drilling Down on the OWASP Top 10

An important part of NetSPI’s API Penetration Testing is targeting the OWASP Top API security vulnerabilities.  

The OWASP Top 10 is a list of the most critical cybersecurity risks to APIs, identified by an industry consensus. Adopting the OWASP Top 10 in your software development and application security testing processes is a strong step toward improving application security for your business, your partners, and your customers.

Use the OWASP Top 10 to Strengthen API Security

1Broken Object Level Authorization
2Broken Authentication
3Broken Object Property Level Authorization
4Unrestricted Resource Consumption
5Broken Function Level Authorization
6Unrestricted Access to Sensitive Business Flows
7Server Side Request Forgery
8Security Misconfiguration
9Improper Inventory Management
10Unsafe Consumption of APIs 
What's the difference between Web Application Penetration Testing and API Penetration Testing? Take a look!
Hours of
Testing Annually

Better API Security is A Click Away

Organized. Proactive. Easy. This is how our clients describe working with NetSPI for application pentesting. Whether you need to test a specific application, or incorporate API security into your overall development process, our offensive security specialists will put our knowledge to work for your business. 

API Pentesting

Get Started with API Pentesting

Discover how NetSPI ASM solution helps organizations identify, inventory, and reduce risk to both known and unknown assets.