Detect wildcard origin reflections and credential exfiltration vulnerabilities in seconds.
| Security Pillar | Status | Inspection Telemetry |
|---|
Access-Control-Allow-Origin: * alongside authenticated user endpoints, arbitrary third-party websites can send cross-origin requests to exfiltrate private user records, session tokens, and database resources via the visitor's authenticated browser session.Select your deployment environment below and copy the tailored configuration snippet to enforce compliance immediately:
# /etc/nginx/conf.d/cors.conf
map $http_origin $cors_origin {
default "";
"~^https?://(app\.domain\.com|portal\.domain\.com)$" "$http_origin";
}
add_header Access-Control-Allow-Origin $cors_origin always;
add_header Access-Control-Allow-Credentials "true" always;A CORS misconfiguration occurs when a server blindly trusts arbitrary incoming origin headers or sets wildcard access on authenticated API endpoints, allowing hostile websites to extract user data.
Using a wildcard with credentials allows any script on the internet to send requests with the victim’s cookies or tokens and read the confidential JSON responses.
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