Common Symptoms
- Users can access protected pages without logging in
- Password reset tokens never expire or are predictable
- OAuth redirects are not properly validated
- Session tokens stored insecurely in localStorage
- Missing rate limiting on login endpoints
- No email verification on signup
Try These Fixes First
Before hiring an agency, try these steps yourself. Many common issues can be resolved with the right approach.
Use a proven auth provider (Supabase Auth, Clerk, Auth0) instead of custom auth
Verify all protected routes check authentication server-side
Add rate limiting to login and password reset endpoints
Store tokens in httpOnly cookies, not localStorage
Implement proper CSRF protection
Add email verification to the signup flow
Frequently Asked Questions
Why does AI-generated authentication break so often?
Authentication requires coordinating multiple systems (database, session store, email, OAuth providers) with precise security requirements. AI tools often generate simplified auth that works in demos but fails in production.
Should I use custom auth or a managed auth provider?
For vibe-coded apps, always use a managed auth provider like Supabase Auth, Clerk, or Auth0. Custom authentication is extremely hard to get right and is the #1 source of security breaches in AI-generated apps.