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CVE-2025-47710: Authentication Bypass Vulnerability in Drupal Enterprise MFA – TFA Module

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Overview

This report provides a comprehensive analysis of the CVE-2025-47710 vulnerability, a significant security flaw detected in the multi-factor authentication (MFA) module, known as Two-Factor Authentication (TFA), for Drupal. The vulnerability presents a risk to any system utilizing versions of the Drupal Enterprise MFA – TFA module from 0.0.0 before 4.7.0, from 5.0.0 before 5.2.0. The flaw, if exploited, can lead to unauthorized access to systems and potential data leakage, significantly impacting businesses and users.

Vulnerability Summary

CVE ID: CVE-2025-47710
Severity: High – 7.4 (CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Unauthorized system access, potential system compromise or data leakage

Affected Products

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Product | Affected Versions

Enterprise MFA – TFA for Drupal | 0.0.0 before 4.7.0
Enterprise MFA – TFA for Drupal | 5.0.0 before 5.2.0

How the Exploit Works

The CVE-2025-47710 vulnerability arises from an alternate authentication path or channel within the Drupal Enterprise MFA – TFA module. This flaw allows an attacker to bypass the multi-factor authentication process, gaining unauthorized access to the system. The vulnerability is network exploitable, which implies that an attacker can exploit it remotely over a network without requiring user interaction or any user privileges.

Conceptual Example Code

The following pseudocode illustrates how an attacker might exploit this vulnerability:

POST /tfa/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "alternate_auth_payload": "..." }

In this example, the attacker sends a malicious JSON payload to the vulnerable endpoint of the TFA module, exploiting the alternate authentication path to bypass the MFA process and gain unauthorized access.

Mitigation Guidance

To mitigate the risk associated with this vulnerability, it is recommended to update to the latest version of the Drupal Enterprise MFA – TFA module. For those who cannot immediately upgrade, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation mechanism until the patch can be applied.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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