Is my Base44 app secure? What the platform handles vs what you can still get wrong

What does Base44 handle for you, and what's still on you?

Base44 is a hosted platform, so it takes on more of the security stack than a tool that just generates code you deploy yourself. It manages hosting, the authentication system, and the underlying data layer, so you're not, for example, hand-writing Row Level Security policies on a Supabase database you own. That genuinely removes a class of the missing-RLS mistakes common to Bolt and Lovable apps.

What's still on you is your application logic: which users can see which records, whether a given entity or endpoint should be readable by everyone, and what data your app chooses to expose. The platform can enforce the rules you set, but it can't know that a particular table shouldn't be world-readable unless you configure it. That's the layer Explain My Build reads.

Has Base44 itself had security flaws?

Yes, and it's worth knowing honestly. In July 2025, security researchers at Wiz disclosed a critical authentication-bypass vulnerability in Base44. Two auth-related endpoints (registration and OTP verification) were exposed without restriction, so anyone who knew an application's app_id, a value hardcoded into URL paths and visible in public manifest files, could register an account inside a private app and reach its data, bypassing SSO. Separately, researchers at Imperva reported a stored-XSS issue in Base44's /apps-show rendering path that could run script in the trusted app.base44.com context.

The important context: these were platform flaws, not something in your app's code, and Wix (which owns Base44) shipped fixes within 24 hours of responsible disclosure, with no evidence of malicious exploitation in the wild. It's a reminder that even a managed platform is not automatically bulletproof, and that platform-level risk is one reason a security-critical app still deserves a human review, not just a code read.

What can I still misconfigure in my own Base44 app?

Even with the platform handling infrastructure, you can still misconfigure your own app in ways that expose data. The most common are:

• Over-broad access rules. Marking an entity or endpoint as readable by anyone when it should be limited to its owner, the platform equivalent of a missing Row Level Security policy.
• Trusting the client. Relying on the front end to hide data or gate an action, rather than enforcing it in your app's access configuration.
• Exposed keys in custom code. If you add custom integrations or paste a third-party API key into client-visible code, you've exposed it regardless of what the platform does.

Explain My Build reads your app's code and config and flags these, citing the specific rule or line, and explains in plain English what each one exposes.

How do I check my Base44 app's data-access rules?

To check your Base44 app, you need to see your access rules the way an attacker would, not the way the polished UI presents them. The interface hides what a user "shouldn't" see, but the real question is what the data layer actually returns to a direct request. That's a code-and-config question, not a click-through-the-app question.

Explain My Build reads your app's configuration and any custom code and produces a plain-English map of what's exposed to whom, cited to the rule. It won't audit Base44's servers, but it will tell you whether your settings match your intent, which is the part you control. Pair it with a human review before launch if the app handles sensitive data.

What you get for your Base44 app

Point Explain My Build at your app's code and config (run it locally so nothing leaves your machine, or paste a public repo URL that's read then deleted) and you get, each cited to your source:

• A plain-English map of your access rules, what's readable by whom, and where a rule looks broader than intended.
• A ranked, code-verified fix-list to hand your AI to tighten the rules.
• A founder runbook explaining how your Base44 app is wired.

The runbook and fix-list are free. The shareable end-user guide is $19/month (or $12/month founding for the first 100), see pricing. Start by documenting your Base44 app to see every access rule in one place.