CVE-2025-3060
📋 TL;DR
This vulnerability in Drupal's Flattern theme allows attackers to execute arbitrary code on affected websites. All Drupal installations using the Flattern theme are potentially vulnerable, regardless of version.
💻 Affected Systems
- Drupal Flattern - Multipurpose Bootstrap Business Profile
📦 What is this software?
Flattern by Flattern Project
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise leading to data theft, defacement, or ransomware deployment
Likely Case
Website defacement, data exfiltration, or backdoor installation
If Mitigated
Limited impact if proper web application firewalls and monitoring are in place
🎯 Exploit Status
Based on Drupal security advisory rating and CVSS score
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Drupal.org for updated version
Vendor Advisory: https://www.drupal.org/sa-contrib-2025-005
Restart Required: No
Instructions:
1. Visit Drupal.org security advisory 2. Download updated Flattern theme 3. Replace existing theme files 4. Clear Drupal caches
🔧 Temporary Workarounds
Disable Flattern Theme
allSwitch to a different Drupal theme to remove the vulnerable component
drush config-set system.theme default YOUR_SAFE_THEME
drush cache-rebuild
🧯 If You Can't Patch
- Implement web application firewall rules to block suspicious theme-related requests
- Enable strict file upload restrictions and disable unnecessary theme features
🔍 How to Verify
Check if Vulnerable:
Check if Flattern theme is enabled in Drupal admin interface at /admin/appearanceCheck Version:
Check theme.info.yml file in sites/all/themes/flattern or similar locationVerify Fix Applied:
Verify theme version is updated and no longer listed in vulnerable themes📡 Detection & Monitoring
Log Indicators:
- Unusual theme file modifications
- Suspicious PHP execution in theme directories
- Unexpected file uploads to theme folders
Network Indicators:
- HTTP requests to theme files with unusual parameters
- POST requests to theme endpoints
SIEM Query:
source="drupal" AND (theme="flattern" OR path="*flattern*") AND action="modify"