Problem Statement
List practical rules for securing cloud APIs that expose user objects.
Explanation
Authorize every request on the server. Check both object ownership and property-level rights before updates. Never trust client-side filtering. Use short-lived tokens and scopes. Rate-limit hot paths like login and resets. Log denies with context. Add tests for IDOR and mass-assignment. These steps address the top API risks and stop common data leaks early.
Code Solution
SolutionRead Only
if (obj.owner !== auth.userId) return 403; const allowed = pick(req.body, editableFieldsFor(auth));
