OWASP 2023 Top 10 API Vulnerabilities and Mitigations

This document is a technical report that outlines the OWASP 2023 Top 10 API vulnerabilities along with their respective mitigations. It begins by explaining the basics of Application Programming Interfaces (APIs), including their significance in modern web applications and the differences in traffic compared to traditional web traffic. The report details the top vulnerabilities, starting with broken object level authorization, which allows unauthorized access to objects due to improper authorization rules. It provides a scenario illustrating how attackers can manipulate API requests to access sensitive information. The report emphasizes the importance of implementing robust authorization mechanisms and testing them thoroughly. Additionally, it discusses broken authentication, highlighting how inadequate authentication mechanisms can lead to account takeovers. The document also covers broken object property level authorization, which can expose sensitive data if not properly managed. Best practices for securing APIs against these vulnerabilities are recommended throughout the report, focusing on industry-standard authentication methods and careful data handling.