STRABL <= 4.5 - Unauthenticated Arbitrary Webhook Creation via REST API Endpoint

Summary

The STRABL – A checkout solution plugin for WordPress is vulnerable to Missing Authentication in all versions up to and including 4.5. The plugin registers a REST API webhook endpoint at /wp-json/strabl/webhook/order with a permission_callback of __return_true, which allows all incoming requests without any authentication or authorization checks. No shared secret, signature validation, HMAC verification, or token-based authentication is implemented. This makes it possible for unauthenticated attackers to create fraudulent WooCommerce orders and mark them as completed by supplying paymentStatus=paid, manipulate existing order statuses by providing an externalOrderId, create new WordPress user accounts with the customer role, issue refunds on existing orders, cancel existing orders, and apply chargeback fees — all without making a legitimate payment or having any valid credentials.

Timeline

1. Jun 19, 2026, 6:51 AM UTCCVE published
2. Jun 22, 2026, 3:59 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Jun 22, 2026, 3:59 PM UTCRecord last updated

Affected versions

• strablengineering STRABL – A checkout solution

  through 4.5

References 14