CVE-2025-14840
📋 TL;DR
This vulnerability in Drupal HTTP Client Manager allows attackers to bypass access controls through forceful browsing, potentially accessing restricted administrative functions or data. It affects Drupal sites using vulnerable versions of the HTTP Client Manager module.
💻 Affected Systems
- Drupal HTTP Client Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could gain administrative access to Drupal sites, modify content, install malicious modules, or exfiltrate sensitive data.
Likely Case
Unauthorized access to restricted administrative interfaces or data exposure through HTTP parameter manipulation.
If Mitigated
Limited impact with proper access controls, but still exposes attack surface for further exploitation.
🎯 Exploit Status
Forceful browsing typically requires minimal technical skill but may need some understanding of Drupal's URL structure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.3.13, 10.0.2, 11.0.1
Vendor Advisory: https://www.drupal.org/sa-contrib-2025-126
Restart Required: No
Instructions:
1. Update HTTP Client Manager module via Drupal admin interface or Composer. 2. For Composer: composer update drupal/http_client_manager. 3. Clear Drupal caches after update.
🔧 Temporary Workarounds
Disable HTTP Client Manager Module
allTemporarily disable the vulnerable module until patching is possible
drush pm:disable http_client_manager
Restrict Access via .htaccess
linuxAdd access restrictions to HTTP Client Manager paths
Add 'Deny from all' to .htaccess in module directory
🧯 If You Can't Patch
- Implement strict access controls and authentication for all administrative interfaces
- Deploy web application firewall rules to detect and block forceful browsing attempts
🔍 How to Verify
Check if Vulnerable:
Check installed module version via Drupal admin at /admin/modules or using drush: drush pm:list | grep http_client_managerCheck Version:
drush pm:list --fields=name,version | grep http_client_managerVerify Fix Applied:
Confirm module version is 9.3.13+, 10.0.2+, or 11.0.1+📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to HTTP Client Manager endpoints
- Multiple 403/404 errors followed by successful 200 responses
Network Indicators:
- HTTP requests with unusual parameters to module-specific paths
- Brute-force style access attempts to administrative URLs
SIEM Query:
source="drupal_access.log" AND (uri="/admin/config/services/http-client-manager" OR uri CONTAINS "http_client_manager") AND status=200