CVE-2025-7393
📋 TL;DR
This vulnerability in Drupal Mail Login modules allows attackers to perform unlimited authentication attempts without rate limiting, enabling brute force attacks against user accounts. It affects Drupal sites using Mail Login modules versions 3.0.0-3.1.x and 4.0.0-4.1.x. Attackers can potentially compromise user credentials through systematic guessing.
💻 Affected Systems
- Drupal Mail Login module
📦 What is this software?
Mail Login by Mqanneh
Mail Login by Mqanneh
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to Drupal sites by brute-forcing admin credentials, leading to complete site compromise, data theft, defacement, or malware injection.
Likely Case
Attackers compromise regular user accounts to access sensitive content, perform privilege escalation, or use compromised accounts for further attacks.
If Mitigated
With proper rate limiting and monitoring, attacks are detected and blocked before successful credential compromise.
🎯 Exploit Status
Brute force attacks require no special tools - attackers can use standard HTTP requests or tools like Hydra/Burp Suite.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.2.0 for 3.x branch, 4.2.0 for 4.x branch
Vendor Advisory: https://www.drupal.org/sa-contrib-2025-088
Restart Required: No
Instructions:
1. Update Mail Login module to version 3.2.0 (if using 3.x) or 4.2.0 (if using 4.x). 2. Use Composer: 'composer update drupal/mail_login'. 3. Or download from Drupal.org and replace module files. 4. Clear Drupal cache.
🔧 Temporary Workarounds
Implement Web Application Firewall Rate Limiting
linuxConfigure WAF or reverse proxy to limit authentication attempts per IP address
# Example nginx rate limiting:
limit_req_zone $binary_remote_addr zone=auth:10m rate=5r/m;
location /user/login {
limit_req zone=auth burst=10 nodelay;
}
Enable Drupal Flood Control
allConfigure Drupal's built-in flood control mechanism for login forms
# In settings.php:
$settings['flood']['user.failed_login_ip']['limit'] = 5;
$settings['flood']['user.failed_login_ip']['window'] = 300;
🧯 If You Can't Patch
- Disable Mail Login module and use standard Drupal authentication
- Implement IP-based blocking for excessive failed login attempts using fail2ban or similar tools
🔍 How to Verify
Check if Vulnerable:
Check Mail Login module version in Drupal admin at /admin/modules or via Drush: 'drush pm-list --type=module --status=enabled | grep mail_login'Check Version:
drush pm-list --type=module --status=enabled --fields=name,version | grep mail_loginVerify Fix Applied:
Confirm module version is 3.2.0+ or 4.2.0+ and test authentication with multiple failed attempts to verify rate limiting works📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from same IP address
- Unusual authentication patterns outside business hours
- Rapid sequence of POST requests to /user/login
Network Indicators:
- High volume of authentication requests
- Traffic patterns showing credential stuffing tools
SIEM Query:
source="drupal_access.log" (POST /user/login) | stats count by src_ip | where count > 10