Securing a web application is an ongoing process embedded right in the development pipeline. Building robust APIs and user authentication requires establishing strict security policies from line one.
1. Database Row Level Security (RLS)
When working with PostgreSQL databases and Supabase backends, Row Level Security guarantees that clients can only query or update records they explicitly own. Configuring strict RLS policies prevents unauthorized data access across endpoints.
2. Sanitizing Input Fields and API Endpoints
Form fields and API endpoints should sanitize every incoming payload before execution. Enforcing input validation on client forms and server routes eliminates Cross-Site Scripting (XSS) vulnerabilities and SQL injection exploits.