Project: 
GoogleTag Manager
Date: 
2025-July-30
Security risk: 
Moderately critical 11 ∕ 25 AC:Complex/A:Admin/CI:Some/II:Some/E:Theoretical/TD:Default
Vulnerability: 
Cross-site scripting
Affected versions: 
<1.10.0
CVE IDs: 
CVE-2025-8362
Description: 

This module enables you to integrate Google Tag Manager (GTM) into your Drupal site by allowing administrators to configure and embed GTM container snippets.

The module doesn't sufficiently sanitize the GTM container ID under the scenario where a user with the Administer gtm permission enters malicious input into the GTM-ID field. This value is directly inserted into a <script> tag, making the site vulnerable to Cross-site Scripting (XSS) attacks.

This vulnerability is mitigated by the fact that an attacker must have a role with the permission Administer gtm, and the input field is limited to 20 characters.

Solution: 

Install the latest version:

If you use the Google Tag Manager module for Drupal 8.x, upgrade to Google Tag Manager 8.x-1.10.

The new version includes validation to prevent injection and restricts risky inputs.

Additionally, site administrators should review which roles have the Administer gtm permission at /admin/people/permissions.

Reported By: 
Fixed By: 
Coordinated By: