CVE-2025-9551
📋 TL;DR
This vulnerability in Drupal Protected Pages module allows attackers to perform brute force attacks by bypassing rate limiting on authentication attempts. It affects all Drupal sites using Protected Pages module versions before 1.8.0. Attackers could potentially guess passwords for protected pages through unlimited login attempts.
💻 Affected Systems
- Drupal Protected Pages module
📦 What is this software?
Protected Pages by Protected Pages Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain unauthorized access to sensitive protected pages containing confidential information, administrative interfaces, or private content by brute forcing credentials.
Likely Case
Attackers successfully brute force access to some protected pages with weak passwords, potentially exposing sensitive content or functionality.
If Mitigated
With strong passwords and additional security layers, impact is limited to failed login attempts and potential account lockouts.
🎯 Exploit Status
Exploitation requires no special tools - attackers can use standard brute force tools against protected page URLs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.8.0
Vendor Advisory: https://www.drupal.org/sa-contrib-2025-101
Restart Required: No
Instructions:
1. Update Protected Pages module to version 1.8.0 via Drupal's update manager or Composer. 2. Clear Drupal cache. 3. Verify module is updated to 1.8.0.
🔧 Temporary Workarounds
Implement Web Application Firewall (WAF) rate limiting
allConfigure WAF or reverse proxy to limit authentication attempts to protected pages
Disable Protected Pages module temporarily
drupalRemove the vulnerable module until patching is possible
drush pm-uninstall protected_pages
🧯 If You Can't Patch
- Implement strong password policies for all protected pages
- Monitor authentication logs for brute force patterns and block suspicious IPs
🔍 How to Verify
Check if Vulnerable:
Check Protected Pages module version in Drupal admin at /admin/modules or via drush: drush pm-list | grep protected_pagesCheck Version:
drush pm-list --fields=name,version | grep protected_pagesVerify Fix Applied:
Confirm module version is 1.8.0 or higher in Drupal admin or via drush📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts to /protected-page URLs from same IP
- Unusual spike in 403 responses for protected content
Network Indicators:
- High volume of POST requests to protected page URLs
- Pattern of sequential authentication attempts
SIEM Query:
source="drupal_access_log" AND (uri="/protected-*" OR uri="*/protected/*") AND status=403 | stats count by src_ip