GuardCue

Is my Base44 app safe to launch?

Paste your address. We check your live Base44 app the way a stranger would, then tell you in plain English what could cost you money, and how to fix it.

Free. No sign-up. We check the one page you give us, and only what any visitor can already see.

Could end your business

An app you believe is private is reachable by someone you never invited.

what we didtried to reach your app without signing in at all
what it showedpages that should have asked us to log in first
What it means for youAnything you put behind that sign-in, staff notes, customer records, internal tools, was never actually behind it. You would have no way of knowing from the inside.
This is how every finding is written. No jargon, ever.
About Base44

Working is not the same as safe.

Base44, now part of Wix, builds a full app including its sign-in and its data from a prompt. Founders use it for internal tools and customer-facing apps alike.

Where your data livesBase44 provides its own sign-in and storage, so who can reach what is decided by how your app and its sign-in were set up, rather than by a database rule you can see. That is what our outside checks probe.
What we find

The faults we find in Base44 apps.

Written the way your own report would write them. These live in the app Base44 built for you, not in Base44’s own service, which is why only a check of your app answers it.

Could end your business

Every customer can read every other customer's records.

What it means for youOne curious user is enough. You never notice, because you only ever look at your own account, and from the inside the app looks exactly right.
what we didmade a new account that owned nothing, then opened the dashboard
what it showedfour records that were not ours
Costs you money

A dead link sits where a customer was about to pay.

What it means for youSomeone ready to buy clicks, hits a page that does not exist, and leaves. It is a lost sale every single time it happens, and nothing tells you it is happening.
what we didclicked every link on the pages we could reach
what it showeda link on the way to paying that leads nowhere
The honest part

What this check cannot see.

Every scanner looks cleaner if it stays quiet about what it missed. We would rather tell you.

Could not check

We check what a stranger can reach from outside. Anything that needs a real account to see is behind a test sign-in, which needs you to prove the site is yours. Your report names what we could not reach.

What has happened before

A real case, on the record.

In July 2025 Wiz Research reported a flaw in Base44 that let someone register a verified account on a private app using only the app’s public identifier, walking past the intended sign-in. Base44 fixed it within 24 hours and found no sign it had been used. That was a flaw in the platform and it is gone; a check of your own app answers the separate question of whether your own setup leaves anything open.

Source: Wiz Research, "Critical vulnerability in Base44" (July 2025)

If the answer is yes

You found something. Now what?

Base44 provides sign-in and storage together, so most of what we find is about who may reach what, rather than about code. Those are settings, and settings are quick to change once you know which are wrong.

The free check works from your live address and proves each fault rather than asserting it. Paying gets you the wording to fix each one and a re-check that says plainly whether it worked.

What a plan adds →

Before you paste your address

Questions from people who built with Base44.

Base44 handles sign-in for me. Does that mean my data is protected?
Sign-in decides who gets in. It does not decide what each person can reach once they are in, and those are different settings. The fault we find most in apps like this is a list that checks somebody is signed in and then shows them everybody's entries.
Everything is inside one platform. Is there less to go wrong?
Fewer moving parts, and the same decisions to make. What changes is where the settings live, not whether anybody set them. A single platform also means one address to try, which is what makes these apps easy to find in bulk.
I have not launched yet. Should I wait until I do?
Check before you launch, because that is when it is cheap. Everything we find is a setting or a small change now, and a conversation with customers later. The free check takes about a minute and needs nothing but the address.
Check one thing at a time

Free checks for a Base44 app.

Can one customer see another customer’s data?Check who can see what →Is my database readable by anyone?Check my database →Can anyone find me on Google?Check if I can be found →

Where these facts come from

Is my Base44 app safe to launch? · GuardCue