FlawPilot
Replit scanner

Your Replit app is live. Is it also secure?

FlawPilot scans any publicly deployed Replit app for real security vulnerabilities. 13 tools, plain-English results, no login required. Get your findings in minutes.

Scan my Replit appHow it works

Free. No account. Works on any live Replit URL or custom domain.

01

You prompt Replit

“Build a Flask backend with a public API and a chat widget.”

02

Replit ships it

FlaskNode.jsPythonGoLive
03

FlawPilot scans

3 findings
  • Missing DMARC and SPF records
  • Verbose error pages leak stack traces
  • Unexpected open ports exposed
13 tools
run in parallel
Fast results
from URL to report in minutes
Zero setup
no login, no install, no code access
Shareable
send results to customers or your team
The thing Replit doesn't tell you

Replit gets your app online fast. The security configuration is on you.

Replit's pitch is frictionless deployment: write code in the browser, deploy with one click, get a live URL immediately. It's one of the fastest paths from idea to production that exists.

The platform handles the hosting. It doesn't configure your security headers, set up email authentication for your domain, or tell you which ports are exposed. Those decisions, or the absence of decisions, are your application's security posture.

Replit apps range from quick prototypes to real products with real users. The gap between the two is often just time and a set of configurations that were never revisited after the first deployment.

Common findings on Replit-deployed apps: missing DMARC and SPF records, absent HTTP security headers, and occasionally development-era configurations (open ports, verbose error messages) that made it to production. None of these require deep security knowledge to fix. But you have to know they're there first.

What Replit left exposed

4
2 pillars
CriticalSecurity

Missing DMARC and SPF records

If you've connected a custom domain, missing email authentication means anyone can impersonate your domain. We check SPF, DMARC, and DKIM and flag exactly what's absent.

HighSecurity

Known CVEs in your frameworks

Nuclei-powered scan against 50,000+ known vulnerability patterns. Catches known issues in the frameworks and libraries your app uses.

MediumInfrastructure

Public storage and asset exposure

Publicly accessible buckets or assets that weren't meant to be public.

HighSecurity

Absent HTTP security headers

Replit's reverse proxy handles HTTPS, but security headers (HSTS, CSP, X-Frame-Options) require application-level configuration that often goes unset.

A real scan surfaces these the way an attacker or enterprise customer would - before they do.

How it works

Paste your URL. Read your results. Done in minutes.

One URL in, a plain-English report out. Every step is bounded and observable, so you always know where you are.

Live pipeline
01
Enter your Replit app URL
Your .replit.app subdomain or custom domain, wherever your app is publicly accessible. No code access, no credentials.
02
FlawPilot runs 13 tools
DNS, TLS, security headers, vulnerability signatures, port scanning, email authentication, storage exposure, technology fingerprinting — all in parallel against your live app.
03
Get findings in plain English
A score across Security, Performance, and Infrastructure. Named findings with plain-language descriptions and fix priorities. Share with your team or customers.
Done
What we scan

What FlawPilot checks on every Replit-deployed app

Replit apps are diverse: Python Flask, Node.js, Ruby, Go, or anything Nix can run. Our scan operates on the external surface of your deployed application, independent of what's inside.

Security Headers

HSTS, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy. Replit's reverse proxy handles HTTPS, but security headers require application-level configuration that often goes unset.

Email Authentication (SPF, DMARC, DKIM)

If you've connected a custom domain, we check whether your email is protected against spoofing. Missing records mean anyone can impersonate your domain.

TLS Configuration

Full chain validation, certificate expiry, cipher suite analysis, and redirect behavior.

Open Ports and Exposed Services

Replit apps can expose multiple ports. We check which are publicly accessible and flag anything unexpected.

Vulnerability Signatures

Nuclei-powered scan against 50,000+ known vulnerability patterns. Catches known issues in the frameworks and libraries your app uses.

DNS and Subdomain Configuration

Whether you're on a custom domain or Replit's subdomain, we check your DNS posture and subdomain takeover risk.

Error Disclosure

Verbose error pages that reveal framework versions, stack traces, or file paths. Common in development configurations that made it to production.

Technology Fingerprinting

What your app tells the world about its tech stack through headers and response patterns.

Storage and Asset Exposure

Publicly accessible buckets or assets that weren't meant to be public.

WAF Detection

Whether a web application firewall is protecting your app.

HTTP Behavior

Redirect chains, cookie security flags, CORS configuration.

Frontend HTML Analysis

Sensitive data patterns in rendered source, inline scripts, and form security.

Performance and Infrastructure

Lighthouse-based checks. Infrastructure signals and performance co-locate with security posture.

Two views, one scan

Your results, formatted for whoever needs to see them.

Every finding is written twice. Flip the toggle on your report to read it as a founder or as the developer who'll fix it - same scan, same data, two registers.

Simple, business-friendly explanations.

Founder View (default)

Founder view

Overall risk level, named findings in plain English, and fix priorities. "Your domain is not protected against email spoofing" instead of "DMARC record missing with p=none."

Common questions about scanning Replit apps

Yes. FlawPilot scans any publicly accessible URL. .replit.app subdomains work exactly the same as custom domains.

Replit scanner

Replit got your app online. FlawPilot tells you what's exposed.

Free, no login, results in minutes. Enter your Replit URL and get a real security report written in language you can actually use.

Scan my Replit app, free

No account. No credit card. Live results in minutes.

Your Replit app is live. Is it also secure? | FlawPilot