This is an illustrative scenario. Names, details, and quotes are fictional.
How A Shopify App secured their shopify app
Solo founder secured a Lovable-built Shopify app before the first merchant churn
The challenge
A solo founder built a Shopify inventory management app with Lovable and launched it on the Shopify App Store. The app was processing data for over 200 merchants within the first month. A merchant reported seeing another store's product data in their dashboard. With no security team and Shopify threatening to delist the app, the founder needed to find and fix every vulnerability immediately.
Vulnerabilities discovered
VibeEval found 18 security issues across this shopify app application.
Cross-Merchant Data Leakage
Stripe Webhook Forgery
SQL Injection in Product Search
Cross-Site Scripting in Reviews
Insecure Direct Object Reference
Missing CSRF Protection
Session Fixation
Information Disclosure in API
Missing Rate Limiting on Login
Insecure Cookie Configuration
Missing Content Security Policy
The solution
VibeEval confirmed the cross-merchant data leakage through a missing tenant filter on the product listing API. It also found a Stripe webhook endpoint that accepted unverified payloads, meaning anyone could forge subscription events. The founder fixed all critical issues in 10 days and avoided the Shopify delisting.
"A merchant saw another store's data and Shopify was about to pull my app. VibeEval found the exact tenant filter bug plus a Stripe webhook vulnerability I never would have caught. Saved my entire business."
Frequently asked questions
What caused the cross-merchant data leakage?
The product listing API endpoint was missing a tenant filter on database queries. When a merchant requested their products, the query returned results across all merchants if the shop_id parameter was omitted from the request.
How did VibeEval find the Stripe webhook vulnerability?
VibeEval tested the webhook endpoint and found it processed Stripe events without verifying the webhook signature. An attacker could forge subscription upgrade events to get free access to paid features.
Can VibeEval scan Shopify apps specifically?
VibeEval scans any web application including Shopify apps. It tests the app's API endpoints, authentication flows, and data handling regardless of the platform it's built for.
How does the founder prevent regressions?
VibeEval runs on every deployment through a GitHub Actions workflow. Any new critical or high-severity finding blocks the deployment until the issue is resolved.
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