Lovable app security checklist: is your app secure?

Is Lovable secure, and does that make my app secure?

Lovable says it supports SOC 2 and GDPR requirements and publishes its security documentation in its trust center. That covers Lovable's platform: its infrastructure, its access controls, its staff. It does not cover the rules inside your app, because you (with Lovable's help) wrote those.

Lovable's security scan runs a quick check every time you publish: a database review, a dependency audit and an MCP server check. A deeper scan, started by hand (or on a schedule, for Lovable Enterprise customers), also reviews access control, unauthenticated endpoints, injection, leaked secrets, payments, authentication and exposed personal data. Lovable's own documentation is clear that these tools cannot guarantee complete security. Treat the scan as a smoke alarm, not an inspection.

What was CVE-2025-48757, and does it affect my app?

CVE-2025-48757, published in May 2025, describes insufficient row-level security policies in Lovable-generated sites up to 15 April 2025 that let unauthenticated attackers read or write database tables. The US National Vulnerability Database lists it with a critical CVSS 3.1 score of 9.3 and notes that Lovable disputes it, on the grounds that each customer is responsible for protecting their own app's data.

The researcher who reported it, Matt Palmer, says he scanned 1,645 projects and found 303 vulnerable endpoints across 170 of them, and that Lovable shipped its security scan with Lovable 2.0 in April 2025. Whatever view you take of the dispute, the practical lesson is the same: if your app was generated before then, or if you have changed tables since, check your policies yourself. A policy that exists is not the same as a policy that is right.

What should a Lovable security checklist cover?

How do I fix Supabase RLS errors in a Lovable app?

RLS errors come in two opposite kinds, and it helps to know which one you have.

• Permission denied (Postgres error 42501, or an empty result). RLS is on and no policy allows the request. That is RLS working. Write the narrowest policy that lets the feature work, for example rows where the owner column equals the signed-in user's ID.
• Everything works for everyone. The more dangerous case. A policy such as USING (true), or a missing RLS switch, lets any user through. Supabase's advisor flags permissive policies (lint 0024, permissive_rls_policy) and policies that exist while RLS is off (lint 0007, policy_exists_rls_disabled).
• Policies that read user metadata. Supabase warns against basing policies on metadata a user can edit themselves (lint 0015, rls_references_user_metadata). Use a table your server controls, such as a team membership table, instead.

When you ask Lovable to fix a policy, re-run the two-user test afterwards. A prompt that makes an error go away can do it by widening access, which is exactly the failure you are trying to prevent.

Which keys are safe to expose in a Lovable app?

Supabase's documentation says the publishable (anon) key is safe to expose, because it only reaches what row-level security allows. A secret key, including the service role key, bypasses every RLS policy and must never go in a browser, a shipped app or source control. The glossary entry on the anon key and the service role key explains the difference. Third-party secrets, such as Stripe or email provider keys, belong in edge function secrets, not in the app's code. See secrets management.

How often should a live Lovable app be re-checked?

After every change that touches data, access or payments, and on a schedule for everything else: dependencies get new vulnerabilities, keys should be rotated, and new tables arrive with new policies. That is why security works better as a habit than an audit. On our plans, security checks, code review and regression tests run on every change before it reaches production, and an engineer other than the author approves it.