Drupal core - Moderately critical - Cross Site Request Forgery - SA-CORE-2021-006

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Project:

Drupal core

Date:

2021-September-15

Security risk:

Moderately critical 10∕25 AC:Basic/A:User/CI:None/II:Some/E:Theoretical/TD:Default

Vulnerability:

Cross Site Request Forgery

CVE IDs:

CVE-2020-13673

Description:

The Drupal core Media module allows embedding internal and external media in content fields. In certain circumstances, the filter could allow an unprivileged user to inject HTML into a page when it is accessed by a trusted user with permission to embed media. In some cases, this could lead to cross-site scripting.

This advisory is not covered by Drupal Steward.

Also see Entity Embed – Moderately critical – Cross Site Request Forgery – SA-CONTRIB-2021-028 which addresses a similar vulnerability for that module.

Updated 18:15 UTC to clarify text.

Solution:

Install the latest version:

If you are using Drupal 9.2, update to Drupal 9.2.6.
If you are using Drupal 9.1, update to Drupal 9.1.13.
If you are using Drupal 8.9, update to Drupal 8.9.19.

Versions of Drupal 8 prior to 8.9.x and versions of Drupal 9 prior to 9.1.x are end-of-life and do not receive security coverage.

Drupal 7 core is not affected.

Reported By:

Aaron Zinck

Fixed By:

Aaron Zinck
Sean Blommaert
Alex Bronstein of the Drupal Security Team
Marcos Cano
Lee Rowlands of the Drupal Security Team
Adam G-H
Jess of the Drupal Security Team
Drew Webber of the Drupal Security Team
Neil Drumm of the Drupal Security Team
Brian Tofte-Schumacher

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