Is your Lovable app secure? A practical check before you launch

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By the FixMyVibe team · Last reviewed 16 October 2026

A Lovable app is a browser frontend that talks to Supabase directly with a public key, so your database access rules (Row Level Security) decide who can read and change data. Check that every table has tight RLS policies, that no secret keys are in frontend code, and that payment webhooks verify their signatures before you launch.

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How a Lovable app is put together

Lovable generates a frontend that runs in the browser and, for data and auth, typically uses Supabase. The browser calls the database API directly with a publishable key that anyone can read. There is no server in between that checks permissions for you, which is why Supabase RLS policies are the main thing standing between a visitor and your data. More on that in our Supabase RLS check.

What went wrong in CVE-2025-48757

CVE-2025-48757 describes insufficient Row-Level Security policies in Lovable-generated sites through 2025-04-15 that could let remote, unauthenticated attackers read or write database tables. The CVE record notes the issue is disputed by Lovable, which says each customer is responsible for protecting their application's data.

The researcher, Matt Palmer, writes that an automated scan completed on 21 March 2025 found 303 endpoints with inadequate RLS settings across 170 of the 1,645 Lovable projects analyzed, looking only at their homepages. The lesson is not "Lovable is unsafe"; it is that generated access rules must be reviewed like any other code.

Lovable's built-in scans and their limits

Lovable now has a Quick scan (runs on publish: database access rules, leaked-password protection, dependency audit, MCP exposure) and a Deep scan of your application code. Use them. Lovable's own documentation states that these tools do not replace a thorough security review and cannot guarantee complete security.

7-point pre-launch checklist

  1. RLS on every public table. No table in public with RLS disabled.
  2. No USING (true) on sensitive tables (profiles, orders, messages), and a WITH CHECK on every insert/update policy.
  3. The secret/service_role key only in Edge Functions, never in frontend code.
  4. No secrets in VITE_ variables. Vite exposes VITE_-prefixed variables to client code, so they end up in the bundle anyone can download.
  5. Stripe webhooks verify the signature (constructEvent with the raw body and your endpoint secret) before trusting any event, such as "paid".
  6. Storage buckets are only public when they hold public assets; user uploads go in private buckets with storage policies.
  7. Leaked-password protection is on if you use email/password sign-in.

Scan your GitHub-synced repo

Lovable can sync your project two-way with a GitHub repository. Repositories Lovable creates are private by default. The free FixMyVibe scan currently takes a public GitHub repo URL; if your repo is private and you don't want to make it public, contact us.

The scan reads the current code, read-only: committed secrets such as Supabase secret keys, risky RLS patterns in your SQL migrations, and Supabase Edge Functions that skip JWT verification. It does not log in to your app, does not connect to your database and does not scan git history, so policies you only created in the Supabase dashboard are not visible to it.

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FAQ

Does Lovable set up RLS for me?

Lovable's docs say its Quick scan reviews your database access rules and flags tables without row-level security and rules that let everyone through, and that it can auto-fix common RLS misconfigurations. Whether a given policy is correct for your app's logic is still your responsibility, so review every policy before launch.

Is the Supabase key in my Lovable bundle a problem?

Not if it is the publishable (anon) key: that key is designed to be public and is only as safe as your RLS policies. It is a problem if a secret/service_role key, or any other private API key, ends up in frontend code.

Was my app affected by CVE-2025-48757?

The CVE covers insufficient RLS policies in Lovable-generated projects through 2025-04-15 (the record notes Lovable disputes it). Whether your app is affected depends on your actual policies, not the date alone: run the RLS check on this page and Lovable's Security view.

Is Lovable's own security scan enough?

Lovable itself says its scans support secure development but do not replace a thorough security review and cannot guarantee complete security. A second, independent check is cheap insurance; neither is a penetration test.

Do you need access to my Lovable account?

No. FixMyVibe only reads the code in a GitHub repository. Lovable can two-way sync a project to GitHub; the free scan currently takes a public GitHub repo URL.

Sources

FixMyVibe is an automated code scan, not a full penetration test, and cannot guarantee that an app is secure. What happens to your code during a scan: see our privacy policy.