Lovable + Firebase Security
Lovable can integrate with Firebase as an alternative to Supabase. This combination requires proper Security Rules to prevent unauthorized access.
Why Lovable + Firebase?
Some developers prefer Firebase's real-time capabilities or have existing Firebase projects. Lovable's AI can integrate Firebase, but security configuration is manual.
Common Vulnerabilities
These are the security issues we find most often in Lovable apps using Firebase.
Default Test Mode Rules
Firebase projects often start with test mode rules that allow anyone to read and write all data indefinitely.
Lovable Doesn't Generate Security Rules
Lovable focuses on client code - Firebase Security Rules must be written separately.
Admin SDK in Client Bundle
AI-generated code may accidentally include Firebase Admin SDK credentials in the frontend.
Missing Data Validation
Security Rules may check auth but not validate data structure or ownership.
What We Check for Lovable + Firebase
Security Rules Audit
Review Firestore and Realtime Database rules for proper access control.
Admin Credential Detection
Scan for Firebase Admin SDK or service account credentials in frontend code.
Rule Expiration Check
Check if rules have expiration dates (test mode) that will open access.
Authentication Validation
Verify all data access requires authentication where appropriate.
Quick Security Wins
Apply these fixes right now to improve your security.
Replace test mode rules: change 'allow read, write: if true' to require authenticationAdd ownership validation: request.auth.uid == resource.data.userIdRemove any Firebase Admin SDK code from client-side bundlesAdd data validation in rules: validate field types and required fieldsTest rules with Firebase Emulator before deployingThe Bottom Line
Lovable + Firebase can be secure but requires manual Security Rules configuration. Never deploy with test mode rules - they're the #1 cause of Firebase data breaches.
Secure Your Lovable + Firebase App
Find Security Rules misconfigurations, exposed credentials, and other vulnerabilities before attackers do.
Start Security ScanFrequently Asked Questions
Does Lovable automatically configure Firebase Security Rules?
No, Lovable generates frontend code but doesn't create Firebase Security Rules. You must write rules manually in firestore.rules or the Firebase console. Without custom rules, Firebase defaults to test mode which allows anyone to read/write all data.
How do I know if my Lovable + Firebase app has test mode rules?
Check Firebase Console > Firestore > Rules. If you see 'allow read, write: if true' or a timestamp-based rule like 'if request.time < timestamp', your data is exposed. These rules were designed for development only and must be replaced before launch.
What's the minimum secure Firebase Security Rule?
At minimum, require authentication: 'allow read, write: if request.auth != null'. Better: validate ownership with 'if request.auth.uid == resource.data.userId'. Best: add data validation, field-level permissions, and rate limiting rules.
Can I use Firebase with Lovable's Supabase integration?
Yes, you can use Firebase alongside or instead of Supabase. However, you'll need to manually add Firebase SDK to your Lovable project and write all Security Rules yourself. Lovable's Supabase integration is more seamless, but Firebase is viable with extra configuration.