Understanding the Email TFA Authentication Bypass Vulnerability
A security flaw has been identified in the Email TFA module for Drupal. This vulnerability, known as an “Authentication Bypass Using an Alternate Path or Channel,” could allow an attacker to bypass the intended authentication process. Essentially, it means that the security mechanism designed to protect user accounts could be circumvented, potentially granting unauthorized access to parts of the system.
CVE Details
Product: Email TFA module for Drupal
Published: November 18, 2025
Severity: Medium
Status: Analyzed
Affected Products
The vulnerability affects versions of the Email TFA module for Drupal from 0.0.0 up to, but not including, 2.0.6. If your Drupal installation uses the Email TFA module, it’s crucial to verify your version.
Current Status
As of December 8, 2025, this vulnerability has been analyzed. This means that the issue has been confirmed and is being actively addressed or has a known mitigation strategy.
Severity Level
This vulnerability is rated as Medium severity, with a CVSS score of 5.4. While not critical, a medium severity rating indicates that the vulnerability could still pose a significant risk if exploited. It’s important to address such issues to maintain a strong security posture.
Possible Solutions
Based on the available information, the vulnerability affects versions of the Email TFA module before 2.0.6. The most crucial step is to update your Email TFA module to version 2.0.6 or higher. This update is expected to contain the necessary fixes to address the authentication bypass vulnerability. Always ensure you back up your Drupal site before performing any updates.
References
https://www.drupal.org/sa-contrib-2025-115
