Is Base44 Safe? A Security Review of the AI App Builder
Base44 builds full apps with entities, auth, and hosting included. The platform is solid · your entity access rules decide whether your data leaks.
By Daniel A · Kraftwire Software
· 6 min readKey Takeaway
Yes, Base44 is safe to build on · the platform's hosting, auth, and infrastructure are professionally managed, especially since the Wix acquisition. The risk lives in your app's configuration: over-permissive entity access rules, full-record API responses, and keys pasted into frontend code are how Base44 apps actually leak data. All three are fixable in an afternoon.
What Base44 Actually Is
Base44 is an AI full-app builder. You describe the product you want and it generates the whole thing: frontend, a built-in database organized around "entities," user authentication, and hosting. No separate Supabase project, no Vercel deploy, no wiring. That all-in-one design is why people ship real products on it in days.
It also concentrates the security question. With a UI-only generator, your backend mistakes are your own. With Base44, the platform hands you a working backend with defaults · and defaults chosen for "it works in the demo" are rarely the defaults you want in production. If you are new to evaluating these platforms, our guide to whether vibe coding is safe sets up the general mental model; this article applies it to Base44 specifically.
The Short Answer: Yes · With Conditions
Separate the two layers:
- Platform infrastructure · TLS, hosting, the auth service, data storage. Managed by Base44 and Wix. Not your job, and not where breaches in Base44 apps come from.
- Your app's access model · which users can read and write which entities, what your API responses contain, and what secrets your generated frontend holds. Entirely your job.
Every serious issue we see in Base44 apps falls in the second layer. Here are the classes that matter, in order of impact.
1. Over-Permissive Entity Access Rules
Entities are Base44's database tables, and each one carries access rules deciding who can read, create, update, and delete records. The failure mode is simple: rules left broad because broad rules make the demo work. "Any logged-in user can read all records" feels fine while you are the only user. In production it means customer A can fetch customer B's orders, messages, or profile by calling the same API the app itself uses.
How to fix it
- Go entity by entity and write down who should see what. If you cannot answer for an entity, that entity is not ready for production.
- Scope reads and writes to the record owner wherever the data belongs to a user: the creator can read their own records, nobody else's.
- Reserve broad read access for genuinely public data, like a catalog or a blog.
- Test as a second account. Create two users, put data in each, and try to read across. If it works, your rules are decoration.
This is the Base44 equivalent of missing RLS in Supabase apps, and it dominates findings on no-code platform security generally: the database ships pre-wired, so nobody double-checks who it answers to.
2. Full-Record Responses
Even with sensible per-user rules, Base44 apps tend to over-share at the field level. The UI shows a name and an avatar; the API response behind it carries the whole record · email address, phone number, internal notes, feature flags, whatever the entity holds. Anyone can open devtools, click your app around, and read fields you never rendered.
A concrete example: a marketplace app renders seller cards with a display name and rating. The entity behind those cards also stores the seller's email, payout details, and a moderation flag. The cards look clean; the JSON behind them is a directory of contact data for scraping.
How to fix it
- Open your app, open the Network tab, and read the actual JSON your app receives. This five-minute exercise is the highest-value audit step on this list.
- Split sensitive fields into a separate, more restricted entity. Keep the public profile lean and put private contact data behind tighter rules.
- Never store anything in a user-readable entity that you would not show that user on screen.
3. API Keys in the Frontend
Base44 apps grow integrations fast: email, payments, AI calls, enrichment APIs. When the AI wires one up client-side, the key ships to every visitor's browser. Frontend code is public code · anyone can extract that key and run up your bill or access the connected account.
How to fix it
- Move third-party calls into backend functions so the key stays server-side and the browser only ever talks to your app.
- Search your generated code for
sk_, key, token, and Bearer before every launch, or point our free secret scanner at your deployed app.
- If a key already shipped, rotate it first and refactor second. A leaked key stays leaked no matter how fast you delete the code.
The dedicated guide to API keys in frontend code explains which keys are public-by-design and which are radioactive.
4. UI Gating Mistaken for Authorization
The AI builds you an admin page and hides the link from non-admins. Hiding the link is not protection: if the underlying entities still answer to any logged-in user, an attacker skips your navigation entirely and queries the data directly.
How to fix it
- Enforce roles at the entity-rule level, not in the interface.
- Assume every API your app can call, an attacker can call too, with any parameters they like.
5. Apps Left Public That Should Not Be
Base44 makes it trivial to share an app, which is great until an internal tool with real customer data ends up reachable by anyone with the URL. Unlisted is not private.
How to fix it
- Require authentication on anything touching real data, even "temporary" internal tools.
- Review who can sign up. An app that requires login but accepts any signup is public with one extra step.
When NOT to Worry
Keep your paranoia proportional. You can relax when:
- The app holds no real user data · a prototype full of seed data has nothing to leak.
- The data is genuinely public · broad read rules on a public catalog or blog are correct, not a finding.
- A scanner flags platform infrastructure you cannot control. Base44 runs the hosting layer; your job is the access model, not their TLS config.
How to Verify Before You Launch
Three checks catch most of the above: log in as a second user and try to read the first user's data, read your raw API responses in the Network tab, and search your frontend for secrets. Make the two-account test a habit, not a one-off · rerun it after every feature that adds an entity, because access rules do not inherit from the entities you already secured.
Then let a scanner sweep the rest. SimplyScan runs 51+ checks across 14 categories, and the free tier covers exposed secrets, frontend issues, and speed. The Base44 scanner page lists what we check on this platform, and the full Base44 security guide walks through the hardening steps one by one. If your app scores 80+ with zero critical or high findings, you can put our public trust badge on it and show users you checked.
Built something on Base44? Run a free security scan and find out in thirty seconds whether your entity rules hold up.