Is my Base44 app secure?

Base44 is a hosted, full-stack AI builder. From a natural-language prompt it generates the user interface, a built-in database, authentication, file storage, and serverless backend functions — and it runs all of that for you. Every app comes with RESTful API endpoints that mirror your data model, so the frontend talks to your data over the network like any modern web app.

That hosted convenience is also where gaps hide. The frontend is public by design — its code ships to the browser — so the security can't live there. It lives in two places Base44 leaves to you: your data access rules (who can call which endpoint and touch which records) and where your secrets sit. The app can demo flawlessly while one of those is wider open than you meant.

Because Base44 exposes API endpoints for your data, the decisive question is access control: is each endpoint and record scoped to the right user, or can someone reach data they shouldn't? This is the equivalent of Row Level Security in other stacks — the rule layer that decides which rows a given user may see and change.

• Review the access settings on every data type that holds real or private data — confirm a user can only read and write their own records.

• Check that create, update, and delete permissions are as tightly scoped as read permissions.

• Make sure any 'admin' or privileged data is restricted to admin accounts, enforced by the backend rather than just hidden in the UI.

If you're new to the idea of rule-based data access, our plain-English explainer what is Row Level Security describes the same principle that protects your Base44 data.

Base44 runs serverless backend functions, and that is where private keys belong. Anything referenced from client-side code — or placed in a browser-exposed variable — is public. Integrations multiply this risk: connecting Stripe, Gmail, Slack, or Google Drive brings secret tokens that must stay server-side and be scoped to only what the app needs.

Safe to expose

Public identifiers meant to be seen — your app's public URL, a publishable key from a provider that's explicitly designed for the client — are fine in the frontend.

Never in the frontend

A Stripe secret key, an email or messaging integration token, an AI API key, or any credential that grants real privileges. Keep these in Base44 backend functions. For what to do if one has already shipped publicly, see public .env files and what to do if a secret leaked.

Base44 includes built-in authentication, so the common mistakes aren't in the login screen — they're in what happens after sign-in. Whether one user can reach another's records, and whether privileged actions are enforced by the backend rather than hidden in the interface, are the checks that matter.

• Sign in as one test user and try to load another user's records by changing an id in the URL or a request — you should be blocked.

• Confirm sign-up, sign-in, sign-out, and password reset all work and end in the right state.

• Make sure any admin or privileged action is enforced by the backend, not only by hiding a button.

The full set of login, session, and authorization checks lives in the authentication security checklist.

Before you point real users at a Base44 app, walk through this:

• Data access rules are scoped so each user can only read and write their own records — read, create, update, and delete alike.

• Admin or privileged data is restricted to admin accounts and enforced by the backend.

• Every integration secret (Stripe, Gmail, Slack, AI keys) lives in a backend function, never the frontend.

• No private key is referenced from client-side code or a browser-exposed variable.

• Login, logout, and password reset work, and a logged-in user cannot reach another user's data.

• HTTPS is enforced and basic security headers are in place.

• You have run a scan of the live URL to catch exposed keys and obvious public exposure.

For the broader, tool-agnostic version, see the launch security checklist for vibe-coded apps.

GuardMint scans your live app from the outside — the same surface an attacker sees — and reports the issues visible there. Our methodology explains exactly what the public scan does.

• Detects keys and secrets exposed in your frontend, flagging serious ones.

• Looks for obviously open endpoints and exposed files.

• Checks HTTPS, security headers, and other public launch-readiness signals.

Is my Base44 app secure by default?

Not automatically. Base44 generates a working full-stack app — frontend, database, authentication, and serverless functions — but security depends on configuration it can't decide for you, chiefly which users may read and write which records. A Base44 app can look and work perfectly while data is accessible to people who shouldn't see it. Before launch you should verify your access rules, your authentication settings, and that no private secret is exposed in the frontend.

Where does Base44 store my data, and is it protected?

Base44 provides a built-in database, authentication, and storage, and exposes RESTful API endpoints that match your data model. Because those endpoints are reachable over the network, your protection is the access rules that decide who can call them and which records each user can touch. The risk is an endpoint or table that's open more broadly than you intend — so the key step before launch is confirming access is scoped to the right users.

Can secrets leak from a Base44 app?

Yes, if a private key is referenced from the frontend. Base44 runs serverless backend functions where secrets belong; anything used in client-side code or a browser-exposed variable becomes public. Integration secrets — Stripe, Gmail, Slack, and similar — should live in the backend functions, not in the part of the app that ships to the browser.

How do I check if my Base44 app is safe to launch?

Confirm your data access rules are scoped so each user can only reach their own records; review your authentication settings and that privileged actions are enforced server-side; keep every integration secret in backend functions, not the frontend; and test that a logged-in user can't reach another user's data. You can also run a free scan of the live URL to flag exposed keys and obvious public exposure.