Cursor security checklist: The 7-step guide to secure the app you just built with cursor.

You clone a repo, open it in Cursor, and go grab coffee.

By the time you are back, a hidden runOn: folderOpen task has already exfiltrated your .env file.

That is not a horror story. It is a realistic failure mode when Workspace Trust is not enforced.

This Cursor pre-deploy checklist helps you catch these traps before they become production incidents. If you are also building in Windsurf or Replit, apply the same final gate.

If you are searching for how to secure a cursor app, this is the practical flow for vibe coded app security under real delivery pressure.

Secrets & Environment Variables

• Never paste cloud keys, JWT secrets, Stripe keys, or internal tokens into Cursor chat.
• Move all runtime secrets to your hosting provider secret store, not .env committed files.
• Add pre-commit secret scanning (gitleaks or trufflehog) before any push.
• Review shell history if you copied secrets during debugging and rotate leaked values.

Authentication & Route Protection

• Review every auth guard after agent edits, especially middleware and route-level checks.
• Confirm token expiry checks still run in every auth-sensitive path after refactors.
• Add tests for horizontal access (user A cannot read user B records).
• Block fallback "allow" branches that AI often introduces for convenience.

Database & Storage Security

• Verify tenant scoping in every query generated after Cursor-assisted refactors.
• Enforce least-privilege DB users for migrations, background jobs, and app runtime.
• Confirm storage objects require signed access and ownership checks.
• Audit ORM changes for removed where tenant_id = session.tenant_id clauses.

Input Validation & XSS

• Add strict schema validation (Zod or Valibot) on every write endpoint.
• Escape rich-text or markdown content before rendering user-generated output.
• Reject unknown fields in API payloads to prevent hidden privilege flags.
• Test reflected and stored XSS in all AI-generated form flows.

CORS & API Configuration

• Set explicit Access-Control-Allow-Origin allowlists per environment.
• Disable wildcard CORS on any route that reads private data.
• Enforce SameSite, HttpOnly, and Secure cookie settings.
• Review OpenAPI or route docs so internal endpoints are not exposed by default.

Rate Limiting

• Add IP and user-based limits on login, password reset, and token refresh routes.
• Protect expensive AI routes and export endpoints with stricter burst caps.
• Add per-key throttling if you proxy third-party APIs.
• Return 429 with deterministic retry headers and log abuse spikes.

Run Your Security Audit

If this checklist seems like a lot to run manually, we recommend you run the full Ubserve audit.

It maps the exact issues from this checklist to your real codebase, shows where each one was found, and explains why it is exploitable in your current flow. Then for every vulnerability found, you get a fix-ready prompt that you can paste directly into Cursor to patch it immediately, before release.

Audit my app for these vulnerabilities

If you worked through this checklist carefully, you are already ahead of most teams that ship with AI. Most security incidents aren't dramatic.

They're small gaps that nobody cared to fix, stacked on top of each other, by a founder who was too confident in their AI-generated code.

Run the audit, fix everything it flags, Deploy. You'll be alright.

Samuel,
Founder of ubserve.