Security Audit for Replit Apps
Replit Agent can build, host, and deploy a full-stack app from a single conversation. Because code, database, secrets, and hosting all live in one workspace, a single misconfiguration can expose more than you expect. We review the app the Agent built, not just the scanner output.
30-minute intro call · fixed-scope quote · human review, not scanner output. Read client case studies.
What we find most often in Replit apps
Replit apps typically combine an Express, Flask, or Next.js server with a managed database and Replit's built-in hosting. The risks cluster around the server routes and how the workspace is shared.
API routes without authorization
The Agent often generates routes that check whether a user is logged in but not whether the record belongs to them. Changing an ID in the URL can return another user's data.
Secrets outside the Secrets tool
Keys pasted into code, config files, or prompts instead of Replit Secrets can be committed to history or visible to anyone who can view or fork the project.
Development URLs treated as private
Development preview URLs and debug endpoints can be reachable from the internet. Admin pages, seed scripts, and test routes left in the code are reachable too.
Database queries built from user input
Raw SQL assembled with string concatenation, or ORM filters built from unvalidated request bodies, can lead to injection or mass assignment of fields such as role or plan.
Auth assumptions that do not hold
Whether you use Replit Auth or a custom login, sessions, password resets, and admin checks need to be verified on the server for every sensitive action.
Shared workspace access
Collaborators and multiplayer sessions can see secrets and data. Access that made sense during building should be reviewed before production.
What a Replit security audit covers
A fixed-scope review of your Replit project, deployment settings, and database access, delivered as a prioritized report.
Checks you can run yourself
Start here before you book anything. If any of these fail or you are not sure how to check, that is the signal to get a second pair of eyes.
- Search your code for API keys and move every one into Replit Secrets, then rotate any that were ever committed.
- Request another user's record by changing the ID in a URL or request body. The server should refuse.
- Check your project's visibility and collaborator list, and remove anyone who no longer needs access.
- Remove or protect admin, seed, and test routes before deploying.
- Confirm debug mode and verbose error pages are disabled in your deployment.
Want a scored version? Take the free vibe code security check or work through the 25-point launch checklist.