CVE-2025-13083
📋 TL;DR
This vulnerability in Drupal core allows attackers to exploit web browser caching to access sensitive information that should be protected. It affects Drupal sites with misconfigured access controls, potentially exposing private data to unauthorized users. All Drupal installations within the affected version ranges are vulnerable.
💻 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
Sensitive user data (personal information, private content, administrative details) cached in browsers becomes accessible to attackers, leading to data breaches and privacy violations.
Likely Case
Unauthorized users accessing cached sensitive pages or content that should require authentication, potentially exposing user-specific data.
If Mitigated
With proper access controls and cache headers, the risk is minimal as sensitive content won't be cached or will have appropriate security headers.
🎯 Exploit Status
Exploitation requires specific conditions where sensitive content is cached and access controls are bypassed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Drupal 7.103, 10.4.9, 10.5.6, 11.1.9, 11.2.8
Vendor Advisory: https://www.drupal.org/sa-core-2025-008
Restart Required: No
Instructions:
1. Update Drupal core to the patched version. 2. For Drupal 7: Update to 7.103. 3. For Drupal 8-10: Update to 10.4.9 or 10.5.6. 4. For Drupal 11: Update to 11.1.9 or 11.2.8. 5. Clear all caches after update.
🔧 Temporary Workarounds
Implement proper cache control headers
allAdd Cache-Control headers to prevent sensitive content from being cached by browsers
Add appropriate Cache-Control headers in .htaccess or server configuration for sensitive pages
Review and fix access control configurations
allAudit and correct any misconfigured access controls that might allow unauthorized access to sensitive content
Review Drupal permissions, content access modules, and custom access logic
🧯 If You Can't Patch
- Implement strict cache control headers for all sensitive content
- Conduct security audit of all access control configurations and permissions
🔍 How to Verify
Check if Vulnerable:
Check Drupal version via admin/reports/status or by examining CHANGELOG.txt fileCheck Version:
drush status | grep 'Drupal version' or check admin/reports/status pageVerify Fix Applied:
Confirm Drupal version is updated to patched version and test that sensitive content no longer gets cached📡 Detection & Monitoring
Log Indicators:
- Multiple unauthorized access attempts to sensitive URLs
- Unusual patterns of cache hits on protected content
Network Indicators:
- Requests bypassing authentication to access cached sensitive content
- Browser cache headers showing sensitive content being cached
SIEM Query:
web_access_logs WHERE (url CONTAINS '/admin' OR url CONTAINS '/user') AND response_code = 200 AND referrer IS NULL