When you write code in React, Angular, Vue, or vanilla JavaScript to hide an "Admin Panel" or prevent a button click, you haven’t created security—you’ve created User Experience (UX).

Any user can open Browser Developer Tools, edit local JavaScript state, inspect network traffic, or copy API routes directly into tools like Postman or cURL. If your back-end doesn't explicitly verify who is calling the route and what they are allowed to do, your application is wide open to exploitation. Read More