CORS Checker
Inspect CORS headers, wildcard-origin exposure, and credentialed cross-origin risks.
Best for teams shipping APIs, dashboards, and browser apps that rely on cross-origin requests, credentials, or mixed frontend/backend hosting models.
What This Tool Checks
- Origin reflection detection
- Credentialed CORS risk analysis
- Allowlist-first policy fixes
Why It Matters
CORS problems are easy to miss because applications may seem to work normally while still allowing wildcard or reflected-origin behavior that weakens data isolation.
Best For
Best for teams shipping APIs, dashboards, and browser apps that rely on cross-origin requests, credentials, or mixed frontend/backend hosting models.
What To Do Next
Use the findings to confirm whether you need a tighter allowlist, safer credential handling, or a broader review of origin behavior across environments.
Related Resources
What does the CORS Checker look for?
CORS Checker focuses on origin reflection detection, credentialed cors risk analysis, allowlist-first policy fixes. It is designed to help teams identify this category of weakness quickly and then move into broader workflows if deeper follow-up is needed.
What is the difference between Quick and Comprehensive mode?
Quick mode stays public for focused diagnostics. Comprehensive mode is intended for authenticated workflows where users need saved history, richer follow-up, and broader account-linked execution.
When should I use the full Vulnify platform instead?
Use the full platform when you need more than one focused diagnostic, want to keep reports and history, or need scheduled scans, exports, and broader vulnerability coverage beyond cors checker.