cors-cross-origin-misconfiguration

To test CORS misconfiguration for credentialed cross-origin requests, you analyze Access-Control-Allow-Origin and Access-Control-Allow-Credentials headers to determine if attacker-controlled origins can read authenticated API responses using cookies.

CORS cache poisoning occurs when a caching layer misses the Vary: Origin header. This failure allows a cached response generated for one origin to be incorrectly served to a different cross-origin requester.

Null origin acceptance leads to cross-origin data exposure when a server trusts sandboxed iframe or data URI requests. This permits attacker-controlled pages to bypass allowlists and read authenticated browser responses.

Yes, you can detect reflected origins and wildcard bypasses by validating server response headers against secure origin whitelisting rules. This identifies whether dynamic origin reflection permits unauthorized cross-origin access.

The best way to verify preflight trust errors is by reviewing preflight policy behavior against expected origin whitelisting rules. This ensures browser request behaviors align with secure credential gating and correct trust boundaries.

Yes, this CORS analysis covers internal-network exploitation chains by providing end-to-end assessment scenarios. These include JSONP hijacking context and null-origin sandbox testing to evaluate realistic cross-origin trust boundary bypasses.