Is my Lovable app secure? A founder's pre-launch checklist
You built it in Lovable, it works, and you're about to tell people to pay for it. This is the checklist for the gap between “it works” and “it's safe to charge money for.”
What Lovable's own tooling does and doesn't cover
Builder platforms differ, and their own security tooling changes over time — the honest answer to “did Lovable already check this for me” is: read whatever Lovable publishes about its own scanning today, since that’s the only reliable source, not a third-party guess. What’s true across nearly every hosted AI builder, regardless of what it flags: it is optimized to catch the feature not working, not a second logged-in user reading the first one’s data. That second category is a testing problem — it requires trying the app as an attacker would — not a code-quality problem a linter-style check finds.
“Nothing was flagged” is not the same as “nothing's wrong”
A clean pass from any automated tool, Lovable’s or anyone else’s, tells you it didn’t find what it was looking for. It says nothing about a Supabase table with row level security switched on but written wrong, a Stripe webhook that accepts an unsigned request, or a route that quietly skips the paywall check for a second account. None of those break your app in the way you’d notice while building — they only show up when someone tries them on purpose, with a second account or a fake payment event.
A 5-minute manual checklist
- Headers. Open your deployed site’s network tab and check the response headers for your main page — is there a
Content-Security-PolicyorStrict-Transport-Security? Missing headers are a five-second check and a common gap. - Keys in your JS bundle. View source on your live site, search the loaded JavaScript for
service_role,sk_live_, orsk-. Any of those in the browser is a critical, same-day fix. - RLS on every table. In the Supabase dashboard, check that every table has row level security enabled — and read the policy text itself, not just the toggle. See our Supabase RLS checker guide for the three ways this fails while still showing “on.”
- A second account. Sign up twice, and try to open one account’s data — an invoice, an order, a settings page — from the other. This is the single highest-value five minutes you can spend before charging anyone.
What Deep Scan adds beyond this checklist
The manual list above catches the loudest problems. A Deep Scan runs the same two-account test against every route and table your app has, not just the ones you thought to try, and adds the checks a five-minute pass can’t reasonably cover: forged Stripe webhooks, replayed payments, prices trusted from the browser, and access kept after a cancellation. Every finding comes back with the request that proved it and a dollar figure, not a severity label.
See what a full scan of a Lovable-shaped app actually finds.
The sample report is a real scan of a deliberately vulnerable app — nine findings, the proof behind each one, and what they would cost.