A comprehensive guide to security vulnerabilities commonly found in Lovable-built applications. Learn what issues exist, how to detect them, and how to fix them.
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A critical vulnerability where Lovable-generated Supabase tables lacked Row Level Security (RLS) policies, exposing complete databases to unauthenticated access.
Lovable creates Supabase tables without RLS enabled, allowing anyone to read, modify, or delete all data.
Query your Supabase database without authentication—if you get data back, RLS is missing.
Enable RLS on all tables and create policies restricting access to authenticated users' own data.
Lovable sometimes generates code with API keys hardcoded in frontend JavaScript files.
Search your codebase for patterns like 'sk-', 'sk_live_', or 'service_role'.
Move all secrets to environment variables. Never expose service_role keys in frontend code.
Auth checks happen in React components but not at the API/database level, allowing bypass.
Call your APIs directly without a session token—if they return data, you have a problem.
Add server-side auth checks to all API routes. Use RLS for database-level enforcement.
Lovable apps typically deploy without security headers like CSP, HSTS, or X-Frame-Options.
Check response headers using browser dev tools or security scanners.
Configure security headers in your hosting platform (Vercel, Netlify) or next.config.js.
Default Supabase auth accepts weak passwords, making accounts vulnerable to brute force.
Try signing up with '123456' as a password—if it works, you have weak policies.
Implement password validation requiring 12+ characters with complexity requirements.
Users can sign up with any email without verification, enabling impersonation.
Check if you can use the app fully immediately after signup without confirming email.
Enable email confirmation in Supabase Dashboard under Authentication > Settings.
VAS automatically scans for all common Lovable security issues including missing RLS, exposed credentials, and authentication bypasses.
Scan Your Lovable App FreeLovable as a platform is reasonably secure, but the apps it generates often have security vulnerabilities. The AI prioritizes working code over secure code, leading to missing RLS policies, exposed credentials, and weak authentication. You should always scan and secure Lovable-generated apps before deployment.
CVE-2025-48757 was a critical vulnerability affecting 170+ Lovable apps where Supabase databases were completely exposed due to missing Row Level Security. Attackers could read, modify, or delete any data without authentication. The root cause was Lovable generating tables without RLS policies.
If your app was built before Lovable's security improvements and you haven't manually configured RLS, you're likely vulnerable. Test by querying your Supabase database without authentication—if you can access data, your database is exposed.
1) Enable RLS on all Supabase tables, 2) Create policies restricting access to users' own data, 3) Move secrets to environment variables, 4) Add server-side auth checks, 5) Configure security headers, 6) Enable email verification, 7) Run a security scan to find remaining issues.
Lovable has added some security features, but for comprehensive scanning you should use a dedicated security scanner like VAS that specifically checks for AI-generated code vulnerabilities, RLS configurations, and other common Lovable security issues.
Lovable has improved defaults for new apps, but you shouldn't assume any AI-generated app is secure. Always verify RLS is enabled, secrets aren't exposed, and auth is properly configured. Security requires explicit configuration that AI doesn't always include.
Last updated: January 16, 2026