CVE-2025-13081
📋 TL;DR
This CVE describes an object injection vulnerability in Drupal core that allows attackers to modify dynamically-determined object attributes improperly. It affects Drupal sites running vulnerable versions, potentially leading to arbitrary code execution or data manipulation. All Drupal installations within the specified version ranges are affected.
💻 Affected Systems
- Drupal core
📦 What is this software?
Drupal by Drupal
Drupal by Drupal
Drupal by Drupal
Drupal by Drupal
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or site defacement.
Likely Case
Privilege escalation, data manipulation, or denial of service through object injection.
If Mitigated
Limited impact if proper input validation and access controls are enforced, though object injection could still occur.
🎯 Exploit Status
Exploitation requires understanding of Drupal's object handling and likely requires some level of access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.4.9, 10.5.6, 11.1.9, 11.2.8
Vendor Advisory: https://www.drupal.org/sa-core-2025-006
Restart Required: No
Instructions:
1. Backup your Drupal site. 2. Update Drupal core to the patched version using Composer: 'composer update drupal/core-recommended --with-dependencies'. 3. Clear caches: 'drush cr' or via admin interface. 4. Verify update completed successfully.
🔧 Temporary Workarounds
Input validation hardening
allImplement strict input validation on all user-controlled data that could affect object attributes.
🧯 If You Can't Patch
- Implement strict WAF rules to block suspicious object manipulation patterns.
- Restrict access to vulnerable Drupal instances to trusted networks only.
🔍 How to Verify
Check if Vulnerable:
Check Drupal version via admin interface at /admin/reports/status or using 'drush status' command.Check Version:
drush status | grep 'Drupal version' or check /admin/reports/statusVerify Fix Applied:
Confirm Drupal version is 10.4.9+, 10.5.6+, 11.1.9+, or 11.2.8+.📡 Detection & Monitoring
Log Indicators:
- Unusual PHP object serialization errors
- Unexpected class instantiation in logs
- Failed unserialize operations
Network Indicators:
- HTTP requests with serialized object payloads
- Unusual POST data patterns
SIEM Query:
source="drupal.log" AND ("unserialize" OR "__wakeup" OR "__destruct")