API3:2019 Excessive Data Exposure: Understanding the Risks, Impacts, and How to Prevent It
Excessive data exposure occurs when APIs reveal more fields, data, and information than the client requires through the API response. Excessive data exposure flaws expose all object properties to API calls rather than what the user needs to act on without considering the object’s sensitivity level. This vulnerability exposes you to data leaks, man-in-the-middle attacks, and other cyber threats. That is why excessive data exposure in APIs is listed as #3 in the OWASP API Security Top 10 2019.