CVE-2025-47710 is a high-severity vulnerability affecting the Enterprise MFA - TFA module for Drupal, specifically versions from 0.0.0 before 4.7.0 and from 5.0.0 before 5.2.0. The vulnerability is classified under CWE-288, which pertains to authentication bypass using an alternate path or channel. This means that an attacker can circumvent the multi-factor authentication (MFA) mechanism implemented by this module, effectively bypassing the second factor of authentication that is supposed to enhance security. The vulnerability does not require any privileges or user interaction to exploit (AV:N/AC:H/PR:N/UI:N), indicating that it can be triggered remotely over the network but with a higher attack complexity. The CVSS v3.1 base score is 7.4, reflecting a high impact on confidentiality and integrity, but no impact on availability. Exploiting this flaw allows an attacker to gain unauthorized access to Drupal sites protected by this MFA module, potentially leading to full account compromise, data leakage, and unauthorized actions within the affected web applications. No known exploits are currently reported in the wild, and no patches have been linked yet, which suggests that organizations should prioritize monitoring and prepare for patch deployment once available. The vulnerability is particularly critical because MFA is a key defense mechanism against credential theft and phishing attacks, and bypassing it undermines the security posture of Drupal-based systems relying on this module.

For European organizations, the impact of this vulnerability can be significant, especially for those using Drupal as their content management system with the Enterprise MFA - TFA module enabled. Many public sector institutions, educational organizations, and private enterprises in Europe rely on Drupal for their websites and internal portals. An authentication bypass could lead to unauthorized access to sensitive personal data protected under GDPR, intellectual property, and critical business information. This could result in regulatory fines, reputational damage, and operational disruptions. Additionally, attackers gaining access through this vulnerability could escalate privileges or move laterally within networks, increasing the risk of broader compromise. Given the high confidentiality and integrity impact, organizations handling sensitive customer or citizen data are at particular risk. The lack of user interaction required for exploitation means that attacks could be automated and widespread, increasing the threat level. The absence of known exploits currently provides a window for proactive defense, but also means that organizations must act swiftly once exploit code becomes available.

To mitigate this vulnerability, European organizations should first inventory their Drupal installations to identify usage of the Enterprise MFA - TFA module and verify the versions in use. Until patches are released, organizations should consider temporarily disabling the vulnerable MFA module or enforcing alternative MFA solutions that are not affected. Implementing additional layers of security such as Web Application Firewalls (WAFs) with rules to detect anomalous authentication attempts can help reduce exposure. Monitoring authentication logs for unusual access patterns or repeated failed MFA challenges is critical. Organizations should also ensure that Drupal core and all modules are kept up to date and subscribe to security advisories from Drupal and relevant cybersecurity bodies. Once patches are available, rapid deployment is essential. Furthermore, organizations should review their incident response plans to prepare for potential exploitation and conduct user awareness training emphasizing the importance of MFA and recognizing suspicious activity. Network segmentation and least privilege principles should be enforced to limit the impact of any successful compromise.