Understanding the Brute Force Risk in Drupal Protected Pages
A security flaw has been identified in the Drupal Protected Pages module that could leave your protected content vulnerable. This issue, tracked as CVE-2025-9551, involves an “Improper Restriction of Excessive Authentication Attempts,” which essentially means it’s easier for attackers to guess passwords through repeated, automated tries, known as a brute force attack. If successful, such an attack could grant unauthorized individuals access to pages and content that should be secure.
CVE Details
This vulnerability affects the Drupal Protected Pages module.
- Published Date: October 10, 2025
- Severity: Medium
- Status: Analyzed
Affected Products
The vulnerability specifically impacts installations using the Drupal Protected Pages module. Versions from 0.0.0 up to, but not including, 1.8.0 are susceptible. If your Drupal site uses this module and falls within these version numbers, it’s crucial to take action.
Current Status
As of its last modification on January 5, 2026, this vulnerability has been fully analyzed. This means security experts have thoroughly investigated the flaw, and its characteristics are well understood within the cybersecurity community.
Severity Level
The CVE-2025-9551 vulnerability is rated with a Medium severity level, carrying a CVSS score of 6.5. While not classified as critical, a successful brute force attack can still lead to significant consequences, including unauthorized data access and potential reputation damage. It’s a risk that should not be overlooked, especially for websites handling sensitive information.
Possible Solutions
Addressing this vulnerability is straightforward and primarily involves updating your module. Based on the vulnerability description, the issue exists in versions before 1.8.0, indicating that version 1.8.0 or newer likely contains the fix.
- Update Your Module: The most important step is to update your Drupal Protected Pages module to version 1.8.0 or later as soon as possible. This update should include the necessary fixes to prevent brute force attacks.
- Implement Rate Limiting: Configure your web server or a security module to limit the number of login attempts allowed from a single IP address within a specific timeframe.
- Use CAPTCHA: Integrate CAPTCHA or reCAPTCHA challenges on your protected page login forms to distinguish between human users and automated bots.
- Strong Password Policies: Enforce strong, unique passwords for all users and consider a policy for regular password changes.
- Multi-Factor Authentication (MFA): For an added layer of security, especially for sensitive protected content, enable multi-factor authentication if supported by your Drupal setup.
Regularly reviewing your Drupal site’s security posture and keeping all modules, themes, and core up to date is a fundamental practice in preventing such vulnerabilities.
References
https://www.drupal.org/sa-contrib-2025-101
