SECURITY TESTING FOR SAAS APPLICATIONS

Micro-SaaS is the top indie hacker business model, and most are vibe-coded with Cursor, Bolt, or Replit. AI-generated SaaS code frequently lacks tenant isolation, API key management, and subscription enforcement – one tenant data leak can kill your entire business overnight.

Scan your saas applications for vulnerabilities

Why security matters for saas applications

SaaS Applications handle sensitive data and business-critical operations. A single vulnerability can lead to data breaches, financial loss, and damaged reputation. VibeEval automatically tests for the most common security issues specific to saas applications.

Top vulnerabilities in saas applications

Tenant Data Leakage

Missing or broken tenant isolation allows users from one organization to access another tenants data through manipulated API requests or shared database queries without proper filtering.

API Key Mismanagement

API keys stored in client-side code, shared across tenants, or lacking proper rotation and revocation mechanisms.

Privilege Escalation

Regular users can gain admin or owner permissions by modifying role parameters in API requests or exploiting missing authorization checks on management endpoints.

Subscription Bypass

Users can access premium features or exceed plan limits by directly calling API endpoints that lack server-side plan enforcement.

Insecure Webhook Handling

Webhook endpoints that process events without verifying signatures, allowing attackers to forge subscription upgrades or trigger unauthorized actions.

Invite Link Abuse

Team invitation links that never expire, can be reused, or grant higher permissions than intended, allowing unauthorized access to organizations.

How VibeEval secures saas applications

Three steps to find and fix security issues in your saas applications.

VibeEval tests tenant isolation by attempting cross-tenant data access across every API endpoint in your SaaS app

Our scanner verifies subscription enforcement at the API level, catching bypass routes that let free users access paid features

Get a detailed multi-tenant security report showing exactly where tenant boundaries are weak or missing

Frequently asked questions

How does VibeEval test multi-tenant isolation?

VibeEval creates test sessions for different tenants and attempts to access resources across tenant boundaries. It checks every API endpoint, database query pattern, and file storage path for tenant leakage.

Can VibeEval detect subscription bypass vulnerabilities?

Yes. VibeEval maps your feature gates and tests whether free-tier accounts can access premium endpoints directly. It also checks for billing webhook forgery vulnerabilities.

Does VibeEval support testing SSO and OAuth flows?

VibeEval tests SSO integration points including SAML and OAuth flows, checking for token leakage, redirect bypasses, and session fixation attacks common in SaaS apps.

How do I secure API keys in my SaaS application?

Never expose API keys in client-side code. Use server-side key management, implement key rotation, and scope keys to specific tenants. VibeEval checks for all these patterns.

What is the most critical SaaS security vulnerability?

Tenant data leakage is the most damaging. A single tenant isolation failure can expose all customer data simultaneously, leading to data breaches and loss of customer trust.

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Test your saas applications before launch

Start testing your saas applications for security vulnerabilities with VibeEval.