The Cost Calculator Builder plugin for WordPress is vulnerable to Unauthenticated Payment Status Bypass in all versions up to, and including, 3.6.9 only when used in combination with Cost Calculator Builder PRO. This is due to the complete_payment AJAX action being registered via wp_ajax_nopriv, making it accessible to unauthenticated users, and the complete() function only verifying a nonce without checking user capabilities or order ownership. Since nonces are exposed to all visitors via window.ccb_nonces in the page source, any unauthenticated attacker can mark any orders payment status as completed without actual payment.
Weakness
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Cost_calculator_builder | Stylemixthemes | * | 3.6.10 (excluding) |
Potential Mitigations
- Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) [REF-229] to enforce the roles at the appropriate boundaries.
- Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, consider using authorization frameworks such as the JAAS Authorization Framework [REF-233] and the OWASP ESAPI Access Control feature [REF-45].
- For web applications, make sure that the access control mechanism is enforced correctly at the server side on every page. Users should not be able to access any unauthorized functionality or information by simply requesting direct access to that page.
- One way to do this is to ensure that all pages containing sensitive information are not cached, and that all such pages restrict access to requests that are accompanied by an active and authenticated session token associated with a user who has the required permissions to access that page.
Related Attack Patterns
References
- https://plugins.trac.wordpress.org/browser/cost-calculator-builder/tags/3.6.7/includes/classes/CCBAjaxAction.php#L98
- https://plugins.trac.wordpress.org/browser/cost-calculator-builder/tags/3.6.7/includes/classes/CCBOrderController.php#L408
- https://plugins.trac.wordpress.org/changeset/3437516/cost-calculator-builder/trunk/includes/classes/CCBOrderController.php?old=3426823\u0026old_path=cost-calculator-builder%2Ftrunk%2Fincludes%2Fclasses%2FCCBOrderController.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b8415e5f-17a4-425c-ac28-5dd886d1bcf1?source=cve