SA-CONTRIB-2013-087 - Payment for Webform - Access Bypass

This module enables you to ask for or require payments before users can submit webforms. It previously allowed anonymous users to sometimes use other anonymous users’ payments when submitting a form. Payment for Webform never supported anonymous users, but there was also nothing that prevented them from using the Webform component.

This vulnerability is mitigated by the fact that an attacker must be anonymous and that other anonymous users must have made payments that have not been used for submitting a webform yet. It does not compromise sites’ security, nor does it allow anonymous users to do anything they would not have been able to do, if they had made a payment themselves.

CVE identifier(s) issued

• CVE-2013-4594

Versions affected

• Payment for Webform 7.x-1.x versions prior to 7.x-1.5.

Drupal core is not affected. If you do not use the contributed Payment for Webform module, there is nothing you need to do.

Solution

Install the latest version:

• If you use the Payment for Webform module for Drupal 7.x, upgrade to 7.x-1.5

Additionally, if you have any forms that use the component and are accessible to anonymous users, you may need to update those to prevent form validation errors.

Also see the Payment for Webform project page.

Reported by

• Herman van Rink (helmo)
• Clemens Tolboom (clemens.tolboom)
• Greg Knaddison (greggles) of the security team

Fixed by

• Bart Feenstra (Xano), the module maintainer

Coordinated by

• Greg Knaddison of the Drupal Security Team