Free SaaS Security Scanner
Test your SaaS application's API, authentication, CORS policy, rate limiting, and OWASP Top 10 vulnerabilities in 30 seconds. Built for modern multi-tenant apps.
Scan My SaaS App — FreeNo signup · No credit card · Results in 30 seconds
What the scanner checks
API authentication and rate limiting
Tests if API endpoints enforce authentication, rate limits, and request size limits to prevent abuse.
CORS misconfiguration
Detects permissive CORS policies (Access-Control-Allow-Origin: * with credentials) that enable cross-site data theft.
JWT and session security
Inspects cookie flags on session tokens and checks for exposed JWT secrets in JavaScript bundles.
Exposed admin and debug endpoints
Scans for /admin, /debug, /api/docs, /.env, /swagger.json, and GraphQL introspection leaks.
OWASP API Top 10
Tests against the OWASP API Security Top 10 including broken object-level authorization and excessive data exposure.
Subdomain takeover risks
Scans DNS records for dangling CNAMEs that point to deprovisioned cloud services — a common multi-tenant pitfall.
SaaS Security Is a Trust Business
A single security breach in a SaaS product affects every customer simultaneously. Enterprise buyers demand SOC 2, ISO 27001, and evidence of continuous vulnerability management before they'll sign a contract. Fast-growing SaaS startups that skip security lose enterprise deals at due diligence.
The hardest SaaS bugs are not cross-site scripting — they are broken object-level authorization (IDOR), where a valid customer can access another customer's data by manipulating IDs. Our scanner tests authentication enforcement, CORS boundaries, rate limiting, and exposed admin endpoints that indicate deeper authorization issues.
Frequently Asked Questions
What security checks matter most for a SaaS application?
API authentication, rate limiting, CORS configuration, session cookie flags, and exposed debug endpoints. Multi-tenant SaaS must also prevent IDOR attacks where users access other customers' data by manipulating URL parameters.
How do I secure API endpoints in a SaaS product?
Require authentication on every endpoint, enforce rate limits per user and per IP, validate input against a schema, use parameterized queries, and never expose stack traces in error responses. Our scanner tests all of these.
What is a subdomain takeover and why is it a SaaS risk?
When a SaaS company deletes a cloud service (Heroku, S3, Azure) without removing the DNS CNAME, an attacker can claim the deprovisioned resource and serve content from your subdomain. It's especially common in multi-tenant SaaS with per-customer subdomains.
Does the scanner test GraphQL endpoints?
Yes. It detects GraphQL introspection enabled in production (a common data exposure issue), unauthenticated GraphQL endpoints, and schema dumps. For deep GraphQL-specific testing, combine with a tool like GraphQL Voyager.
How can I tell if my CORS configuration is safe?
Your backend should never use Access-Control-Allow-Origin: * together with credentials: true. Always whitelist specific trusted origins. Our scanner tests this with multiple Origin headers and reports the exact response.
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