Audit what your Replit project exposes once it is running

Tests the running deployment the way anyone holding the link reaches it: whether transport security is enforced, which security response headers are set, what the service discloses about itself when it errors, and which paths answer without asking who is calling. It needs only the address, and it is the weakest evidence the platform produces, so it is graded that way.

Builds and runs the application in an isolated environment and probes it. This is the layer that settles configuration questions instead of inferring them: whether an unauthenticated request is genuinely refused, whether one account's records stay out of another account's response, and what an error returns when something actually breaks.

Reads the code and the configuration around it: where credentials are read from, whether any of them reach files delivered to the browser, which endpoints check a session and which never do, how data access is written, and which dependencies carry known critical advisories. Findings cite the file they came from, so a result is checkable rather than asserted.

An address is not a permission

A deployed project answers anyone holding the URL. Something built for you, or for one team, is open to everyone unless a sign-in stands in front of it. Nothing announces this, because the app behaves in public exactly as it behaved while you were building it.

Secrets that end up on the client side

A value kept in the secrets store is safe there. The same value read from client-side code, or written into a build, is delivered to every visitor and stays in whatever they cached. The variable looks identical in both cases, which is why this is worth testing rather than recalling.

Endpoints added because they were convenient

A route that dumps a table while you are debugging, an admin action, an export link. They were for you, so they rarely ask who is calling, and they usually outlive the reason they were added. They are also the easiest thing on this list to find from outside.

Development settings that shipped

Errors that print internals, an origin policy that accepts everyone, registration left open, a datastore that accepts a connection from anywhere. Each one made building easier, and each one means something different once the project is public.

Data that outlives the run

A database, an object store or a file the app writes keeps whatever earlier runs put there: test records, a sample import, real user data. Who can read it afterwards is a configuration question, and it is rarely the question anyone was asking while building.

Credentials pasted before there was a better place for them

A token typed into a file during setup and later moved into the secrets store is still sitting in that file's history. Rotating it takes a few minutes and closes the exposure completely, which makes it the cheapest finding on any report.

What does a Replit security audit cover?

What the deployed address exposes, whether endpoints require authentication, where credentials live and whether any reach the browser, how the running service answers a request it should refuse, and what persists between runs. Each result carries its evidence grade, and controls the run could not reach are listed rather than assumed.

Do you connect to my Replit account?

No. StackAttest is not affiliated with Replit and does not integrate with it, sign in to it, or read your workspace. A scan needs the address of the deployed application, and source-level evidence needs a read-only connection to the code.

I am not a security engineer. Will the result mean anything to me?

That is who it is written for. Each finding says what was tested, what happened, and what to change, ordered by what is worth doing first. Nothing in it assumes you already have the vocabulary, and the controls that could not be reached are named plainly instead of being dressed up as passes.

Only a few people use my app. Is this worth doing?

How many people use it and how many people can reach it are different numbers. A deployed address answers anyone who finds it, including automated traffic that neither knows nor cares what the application is for. A scan is the cheap way to learn which of those two numbers you are actually running.

Can you tell whether my secrets are exposed?

The source layer looks for credentials in code and in anything delivered to the browser, and the deployed scan checks what the running application discloses about itself. If a value that should have stayed on the server is reachable, the finding cites the file or the response it came from.

Is a URL scan enough on its own?

It answers the deployment questions and nothing else, at the weakest evidence grade the platform records. It cannot tell you whether one account can reach another account's data, which needs the source or the running system. A scan is never presented in the report as though the code had been read.