Lovable + Supabase Security
Lovable's default choice for backend is Supabase. This combo is powerful for rapid development, but requires proper RLS configuration to be secure. CVE-2025-48757 showed what happens when it's not.
Why Lovable + Supabase?
Lovable uses Supabase as its primary backend, automatically setting up database tables, authentication, and real-time subscriptions. This tight integration means most Lovable apps share similar security patterns - and vulnerabilities.
Common Vulnerabilities
These are the security issues we find most often in Lovable apps using Supabase.
Missing RLS on Generated Tables
Lovable creates Supabase tables quickly but often skips RLS configuration. This means anyone with your anon key can read ALL data.
Overly Permissive RLS Policies
When RLS is enabled, policies may be too broad - allowing authenticated users to read/modify other users' data.
Service Role Key Exposure
Some Lovable apps accidentally include the service_role key in frontend code, bypassing all RLS protections.
Unprotected RPC Functions
Database functions created by Lovable may be callable without authentication, exposing admin functionality.
What We Check for Lovable + Supabase
RLS Policy Verification
We query every table with the anon key to verify RLS is enabled and properly configured.
Service Key Detection
Scan all JavaScript bundles for service_role keys that should never be in frontend code.
RPC Function Testing
Test database functions to ensure they require proper authentication.
Auth Configuration
Check Supabase Auth settings for weak passwords and missing email verification.
Quick Security Wins
Apply these fixes right now to improve your security.
Enable RLS on ALL tables: ALTER TABLE tablename ENABLE ROW LEVEL SECURITY;Add basic user policy: CREATE POLICY "Users own data" ON tablename FOR ALL USING (auth.uid() = user_id);Remove service_role key from any frontend code immediatelySet minimum password length in Supabase Auth settingsEnable email confirmation for new signupsThe Bottom Line
Lovable + Supabase is a powerful combination, but the January 2025 CVE showed that default configurations are not secure. Always enable RLS, write proper policies, and scan before launching.
Secure Your Lovable + Supabase App
Find Row Level Security misconfigurations, exposed credentials, and other vulnerabilities before attackers do.
Start Security ScanFrequently Asked Questions
What was CVE-2025-48757 and how did it affect Lovable apps?
CVE-2025-48757 exposed data from 170+ Lovable applications due to missing Row Level Security (RLS) policies on Supabase tables. Attackers could query any table directly using the public anon key since RLS wasn't enabled by default. The fix is straightforward: enable RLS on all tables and write proper policies.
Is the Supabase anon key in Lovable apps a security risk?
The anon key itself is designed to be public - it's not a secret. Security comes from Row Level Security (RLS) policies that restrict what the anon key can access. Without RLS, the anon key grants full read access. With proper RLS, even with the anon key, users can only access data they're authorized to see.
How do I check if my Lovable app has RLS enabled?
In the Supabase dashboard, go to Database > Tables and check each table. You'll see an RLS badge if enabled. You can also run: SELECT tablename, rowsecurity FROM pg_tables WHERE schemaname = 'public' to see all tables and their RLS status.
Does Lovable automatically configure Supabase security?
No, Lovable focuses on rapid development and creates functional code, but security configuration is your responsibility. Lovable-generated tables typically don't have RLS enabled by default. You must manually enable RLS and write policies for each table containing user data.