CORS Misconfiguration Checker
Check real CORS headers from any URL. Analyzes Access-Control-Allow-Origin, Allow-Credentials, Allow-Headers, and Allow-Methods for common misconfigurations.
What is CORS Testing?
CORS (Cross-Origin Resource Sharing) misconfigurations allow attackers to exfiltrate sensitive data from a target domain by making cross-origin requests from a malicious site. This tool checks the real CORS headers returned by a server, analyzing Access-Control-Allow-Origin values for wildcards, origin reflection, and credential misconfigurations that could be exploited.