CVE-2025-10928 identifies a security vulnerability in the Drupal Access code component, specifically versions before 2.0.5, where there is an improper restriction of excessive authentication attempts, classified under CWE-307. This vulnerability allows attackers to perform brute force attacks by repeatedly trying to authenticate without being blocked or slowed down by the system. The absence of effective rate limiting or lockout mechanisms means attackers can systematically guess passwords or tokens to gain unauthorized access. The Access code is a critical part of Drupal's authentication and access control framework, so exploitation could lead to unauthorized user access, privilege escalation, or compromise of sensitive data. Although no public exploits have been reported yet, the flaw is serious because brute force attacks are relatively easy to automate and can be highly effective if no mitigations are in place. The vulnerability was reserved in late September 2025 and published in late October 2025, but no CVSS score has been assigned yet. The lack of a patch link suggests that a fix may be pending or that users must upgrade to a fixed version (2.0.5 or later) once released. Organizations using Drupal with the affected Access code versions should consider this a critical security issue requiring immediate attention.

For European organizations, the impact of CVE-2025-10928 can be substantial. Many enterprises, government agencies, and service providers in Europe use Drupal as a content management system or for access control on their websites and internal portals. Exploitation of this vulnerability could lead to unauthorized access to sensitive information, including personal data protected under GDPR, intellectual property, or internal communications. This could result in data breaches, regulatory fines, reputational damage, and operational disruption. Additionally, attackers gaining access through brute force could pivot to further compromise internal networks or deploy ransomware. The vulnerability's exploitation could also affect availability if attackers lock out legitimate users or cause system instability. The risk is heightened in sectors with high-value targets such as finance, healthcare, and government services. Without proper mitigation, the vulnerability could be leveraged in targeted attacks or automated campaigns against European Drupal deployments.

1. Immediately upgrade the Drupal Access code to version 2.0.5 or later once the patch is officially released. 2. Until the patch is applied, implement external rate limiting on authentication endpoints using web application firewalls (WAFs) or reverse proxies to restrict the number of login attempts per IP address or user account. 3. Enforce multi-factor authentication (MFA) to reduce the risk of compromised credentials being abused. 4. Monitor authentication logs for unusual patterns indicative of brute force attempts and set up alerts for rapid failed login attempts. 5. Employ account lockout policies that temporarily disable accounts after a defined number of failed attempts, balancing security with user experience. 6. Conduct regular security audits and penetration testing focused on authentication mechanisms. 7. Educate users on strong password practices and consider implementing password complexity requirements. 8. Keep Drupal core and all modules up to date to reduce exposure to known vulnerabilities. 9. Segment critical systems to limit lateral movement if an account is compromised. 10. Collaborate with incident response teams to prepare for potential exploitation scenarios.