Supabase RLS policy flaws can expose user data without triggering errors

An article from DEV Community explains that Supabase authentication and Row Level Security policies must work together to properly secure data. Authentication identifies users, while RLS policies control data access, but broken policies fail silently by returning empty results instead of errors. Common vulnerabilities include forgetting to enable RLS, incorrect policy logic, trusting editable user metadata, and security-invoker views. The author recommends implementing integration tests that verify separate users cannot access each other's data.