The OWASP API Security Top 10 is the definitive guide for developers. Learn about critical risks like BOLA and how to build secure, reliable systems.
APIs have become the central nervous system for modern software, powering everything from mobile applications to cloud-native systems. However, their ubiquity also makes them a primary target and one of the most common attack surfaces in modern software. The Open Web Application Security Project (OWASP) continues to provide a crucial resource for developers with its OWASP API Security Top 10, a document outlining the most critical security risks.
What is the OWASP API Security Project?
The OWASP API Security Project is a global, non-profit community initiative dedicated to creating and maintaining a list of the top 10 security risks for APIs. This document, which is free to use and licensed under Creative Commons, has become a widely adopted standard for developers, architects, and security auditors seeking to build more secure services. The project’s goal is to help developers design and build secure APIs by providing trusted guidance on secure software practices.
A Look at the Top Risks
The OWASP API list highlights vulnerabilities that can lead to significant data breaches and system failures. One of the most prominent risks is Broken Object Level Authorization (BOLA), where an attacker can access or manipulate data objects they shouldn’t have access to. A classic example involves a banking API endpoint like /accounts/{id}
Other critical vulnerabilities frequently cited include Broken Authentication, which covers failures in managing authentication and session tokens, and Unrestricted Resource Consumption, which can lead to Denial-of-Service (DoS) attacks if an API allows for unlimited resource usage. Experts also warn against Server-Side Request Forgery (SSRF) and Unrestricted Access to Sensitive Business Flows, which can expose critical internal processes to attackers.
Practical Guidance for Mitigation
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