Project: 
Date: 
2020-May-06
Vulnerability: 
Remote Code Execution
Affected versions: 
<5.11.0
Description: 

This module enables you to build forms and surveys in Drupal.

The module doesn't sufficiently filter webform element properties (attributes) under the scenario of editing a webform. Malicious user could craft such an attribute (#element_validate, for example) that would invoke execution of undesired PHP code.

This vulnerability is mitigated by the fact that an attacker must have a role with the permission "Edit own webform" (or "Edit any webform").

Solution: 

Install the latest version:

Also see the Webform project page.

Reported By: 
Fixed By: 
Coordinated By: