Stacks - Critical - Arbitrary PHP code execution - SA-CONTRIB-2018-001

Project: Stacks
Date: 2018-January-10
Security risk: *Critical* 18∕25
Vulnerability: Arbitrary PHP code execution

Description

This module enables content editors to create complex pages and layouts on
the fly without the help from a developer, using reusable widgets.
The module does not sufficiently filter values posted to its AJAX endpoint,
which leads to the instantiation of an arbitrary PHP class.
This vulnerability is mitigated by the fact that only sites with the Stacks -
Content Feed submodule enabled are affected.

Solution

Install the latest version:

* If you use the Stacks module for Drupal 8.x, upgrade to Stacks 8.x-1.1

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