WordPress DHL for WooCommerce plugin < 4.0.1 - Unauthenticated Shipping Label Download via IDOR vulnerability

Unauthenticated Shipping Label Download via IDOR vulnerability discovered by Pedro Pinho, Artus KG in WordPress Plugin DHL Shipping Germany for WooCommerce versions 4.0.1...

CVE-2026-16993

The DHL Shipping Germany for WooCommerce WordPress plugin before 4.0.1 does not protect its shipping-label storage directory with server-independent access control, relying only on an Apache .htaccess file, so on a web server that does not honor .htaccess such as nginx an unauthenticated visitor...

CVE-2026-16981

The DHL Shipping Germany for WooCommerce WordPress plugin before 4.0.1 does not perform any authorization check no capability, nonce, login, or ownership check on one of its shipping-label download endpoints, so an unauthenticated attacker can enumerate sequential ids and download every stored...

CVE-2026-16981

The DHL Shipping Germany for WooCommerce WordPress plugin, in versions prior to 4.0.1 , is vulnerable to an Insecure Direct Object Reference (IDOR) flaw. The application fails to perform essential authorization checks—such as capability, nonce, login, or ownership verification—on a specific shipp...

CVE-2026-16981: Authorization Bypass Through User-Controlled Key

The DHL Shipping Germany for WooCommerce WordPress plugin before 4.0.1 does not perform any authorization check no capability, nonce, login, or ownership check on one of its shipping-label download endpoints, so an unauthenticated attacker can enumerate sequential ids and download every stored...

CVE-2026-16993: Exposure of Sensitive Information to an Unauthorized Actor

The DHL Shipping Germany for WooCommerce WordPress plugin before 4.0.1 does not protect its shipping-label storage directory with server-independent access control, relying only on an Apache .htaccess file, so on a web server that does not honor .htaccess such as nginx an unauthenticated visitor...