CORS Misconfiguration Testing: Cross-Origin Security Risks for Singapore Enterprises

Cross-Origin Resource Sharing (CORS) controls which external origins can access your APIs and resources. Misconfigurations can allow attackers to make cross-origin requests that should be blocked — potentially accessing authenticated API endpoints from malicious websites. Testing evaluates: wildcard origins, reflected origins, trusted subdomain exploitation, credentials inclusion with permissive origins, and pre-flight request handling.