CVE-2025-10928 identifies a vulnerability in the Drupal Access code component affecting versions before 2.0.5. The root cause is an improper restriction of excessive authentication attempts (CWE-307), which means the system does not adequately prevent or limit repeated login attempts. This weakness allows attackers to perform brute force attacks against authentication mechanisms, attempting numerous password guesses without being blocked or slowed down. The vulnerability requires network access and low privileges but does not require user interaction, making it remotely exploitable. The CVSS 3.1 base score is 6.3, indicating a medium severity level, with the vector AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L, meaning the attack can be performed remotely with low complexity, requires some privileges, no user interaction, and impacts confidentiality, integrity, and availability to a limited extent. Although no known exploits are currently reported in the wild, the vulnerability poses a significant risk to Drupal sites that rely on the Access code for authentication. The lack of rate limiting or lockout mechanisms can lead to unauthorized access if attackers successfully guess credentials, potentially compromising sensitive data and disrupting services. The vulnerability was reserved on 2025-09-24 and published on 2025-10-29, with no patch links currently provided, indicating that users should upgrade to version 2.0.5 or later once available or apply recommended mitigations. Monitoring authentication attempts and implementing additional throttling or CAPTCHA mechanisms can help mitigate exploitation risks.

For European organizations, this vulnerability could lead to unauthorized access to web applications running Drupal with the vulnerable Access code, potentially exposing sensitive data and disrupting services. Given Drupal's widespread use among government, educational, and commercial sectors in Europe, exploitation could affect critical infrastructure and public-facing services. The brute force nature of the attack could allow attackers to compromise user accounts, leading to data breaches, privilege escalation, and service outages. The impact on confidentiality, integrity, and availability is moderate but significant enough to warrant prompt action. Organizations with weak password policies or lacking multi-factor authentication are at higher risk. The absence of known exploits in the wild currently reduces immediate threat but does not eliminate future risk. The vulnerability could also be leveraged as part of larger attack campaigns targeting European entities, especially those with strategic importance or high-value data.

European organizations should prioritize upgrading Drupal Access code to version 2.0.5 or later as soon as patches are available. In the interim, implement strict rate limiting on authentication endpoints to prevent rapid repeated login attempts. Deploy multi-factor authentication (MFA) to reduce the risk of compromised credentials. Enable detailed logging and monitoring of authentication attempts to detect and respond to brute force activities promptly. Consider integrating CAPTCHA challenges after a defined number of failed login attempts to hinder automated attacks. Review and enforce strong password policies to reduce the likelihood of successful brute force guesses. Network-level protections such as web application firewalls (WAFs) can be configured to detect and block suspicious login patterns. Conduct regular security assessments and penetration testing focused on authentication mechanisms. Finally, raise user awareness about phishing and credential security to complement technical controls.