Usually not, by default. Lovable and other AI builders ship working UI fast, but they routinely leave Supabase row-level security off, API keys in the client bundle, and no real auth. Check those, plus rate limiting and secrets in your repo. If you skipped security on purpose, assume it's open until proven otherwise.
You shipped something real in a weekend. That part is genuine. The question now is whether the data behind it is actually protected, or whether it just looks protected because nobody has poked at it yet.
Here's the uncomfortable part. AI builders like Lovable, Bolt, v0, Cursor, and Replit are tuned to get you a working screen as fast as possible. Security is friction, so it gets skipped unless you ask for it. The login page renders, the data loads, the demo works. None of that tells you whether a stranger can read your whole database from the browser console.
This is the single most common hole in AI-built apps. If you use Supabase and row-level security (RLS) is off, every table is readable and writable by anyone with your public anon key, and that key is sitting right in your frontend. Not "users can see their own data." Everyone, all the data. Open your Supabase dashboard and confirm RLS is enabled on every table, then confirm you have actual policies, not just the switch flipped. We wrote up the full fix in our Supabase RLS hardening guide.
Open your browser dev tools, go to the Sources or Network tab, and search the loaded JavaScript for "key", "secret", "sk-", and "Bearer". A public anon key is fine. A service-role key, an OpenAI key, a Stripe secret key, or any third-party admin key in the bundle is a problem anyone can copy. Those keys should live on a server or in an edge function, never shipped to the browser. More on this in exposed API keys in AI-built apps.
A login form that checks a password in frontend code is theatre. Real auth means the server validates every request and decides what that user is allowed to touch. Test it: log in as a normal user, open dev tools, and try to hit an endpoint or table that should be admin-only. If it returns data, you don't have auth, you have a curtain.
Without rate limiting, anyone can hammer your signup, login, password-reset, or any AI endpoint until it costs you money or takes you down. AI builders almost never add this. Check whether your endpoints throttle repeated requests from the same source. If you have a "generate" button wired to an LLM with no limit, someone can run up your bill in an afternoon.
Search your git history, not just the current files, for .env contents, keys, and passwords. People delete a secret from the latest commit and forget it lives forever in the history. If your repo is public, or ever was, treat any committed secret as already leaked and rotate it.
It doesn't mean the tool is bad. It means the defaults optimize for speed, and security is something you opt into. Here's the gap in plain terms.
| What the demo shows | What it doesn't show |
|---|---|
| A working login page | Whether the server enforces anything after login |
| Data loading on screen | Whether anyone can read the same data without logging in |
| A deployed live URL | RLS off, keys in the bundle, secrets in the repo |
| An AI feature that responds | No rate limit, so the bill is uncapped |
Most of this you can do in an afternoon with dev tools, your Supabase dashboard, and git. Run our free production readiness check for a structured self-audit, and read is my AI app production-ready for the full checklist. If you want the broader vulnerability map, the OWASP Top 10 for vibe-coded apps covers what tends to break.
If you want a second set of eyes, our first AI code security audit is a free 15-minute review. We tell you what's exposed and what to fix first. If we can't find a real blocker, you've lost 15 minutes and gained a clean bill of health. We cover Lovable's specific failure modes here, and the same patterns show up across Bolt, v0, Cursor, and Replit.
If the audit finds real holes and you'd rather not patch them yourself, that's the work we do. Our prototype-to-production service starts with a fixed-price Week-1 build audit at $4,000, and full hardening runs from $14,000, fixed price, agreed up front. Senior engineers only, a working demo every week before each payment, and 100% of the code and IP transferred to you from day one. If you just want the verdict before deciding, the due-diligence rescue audit is $2,500 and credits in full toward the rescue.
The short version: assume your AI-built app is open until you've checked these five things. Most of the time, the fixes are straightforward once you know where to look.
Usually not. Lovable is built to get you a working app fast, so security is opt-in. By default it commonly ships with Supabase row-level security off, public keys doing too much, and no real server-side auth. The app works, but the data behind it is often reachable from the browser until you lock it down.
Open browser dev tools and search the JavaScript for secret keys. Check your Supabase dashboard for row-level security and real policies. Try to access admin data as a normal user. Grep your git history for committed secrets. If any of those turn up something, you have a hole. Our free production readiness check walks you through it.
Supabase row-level security left off. When RLS is disabled, your public anon key, which lives in the frontend, can read and write every table. That means anyone visiting your site can pull your entire database from the browser console. It's the first thing we check and the most frequent one we find.
If those keys are privileged, yes. A public anon key is fine. But a service-role key, an LLM key, or a payment secret in the client bundle can be copied by anyone who opens dev tools and used to run up charges or reach data they shouldn't. Privileged keys belong on a server, never in the browser.
A free 15-minute review where we look for the common AI-build failure modes: RLS off, exposed keys, missing auth, no rate limiting, and secrets in your repo. We tell you what's exposed and what to fix first. We find every blocker or the audit is free. If you want fixes after, prototype-to-production starts at a fixed $4,000 Week-1 audit.
Free 15-min build audit