CVE-2020-26295
📋 TL;DR
This vulnerability allows authenticated administrators with specific permissions to inject executable files via layout XML in OpenMage, a community-driven alternative to Magento CE. Attackers could achieve remote code execution on affected servers. Organizations using vulnerable OpenMage versions are affected.
💻 Affected Systems
- OpenMage
📦 What is this software?
Openmage by Openmage
Openmage by Openmage
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise leading to data theft, malware deployment, or complete system takeover via remote code execution.
Likely Case
Privileged administrator account compromise leading to website defacement, data exfiltration, or backdoor installation.
If Mitigated
Limited impact if proper access controls and monitoring are in place, potentially only affecting specific CMS pages.
🎯 Exploit Status
Requires authenticated administrator access with specific permissions
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 19.4.10 or 20.0.5
Vendor Advisory: https://github.com/OpenMage/magento-lts/security/advisories/GHSA-52c6-6v3v-f3fg
Restart Required: No
Instructions:
1. Backup your OpenMage installation and database. 2. Update to OpenMage version 19.4.10 or 20.0.5. 3. Clear cache and recompile if necessary. 4. Verify the fix by checking version.
🔧 Temporary Workarounds
Restrict Administrator Permissions
allRemove import/export data and edit CMS pages permissions from administrators who don't need them
Implement Web Application Firewall
allDeploy WAF rules to block XML injection attempts and file uploads via layout XML
🧯 If You Can't Patch
- Implement strict access controls and least privilege for administrator accounts
- Monitor and audit administrator activities, especially import/export and CMS editing operations
🔍 How to Verify
Check if Vulnerable:
Check OpenMage version in admin panel or via composer.json. If version is below 19.4.10 or 20.0.5, system is vulnerable.Check Version:
php bin/magento --versionVerify Fix Applied:
Verify OpenMage version is 19.4.10 or higher (for 19.x branch) or 20.0.5 or higher (for 20.x branch).📡 Detection & Monitoring
Log Indicators:
- Unusual administrator activity with import/export functions
- Suspicious XML uploads or modifications to layout XML files
- File creation in unexpected directories
Network Indicators:
- Unusual outbound connections from web server
- File uploads to admin endpoints
SIEM Query:
source="web_access.log" AND (uri="/admin/*/import" OR uri="/admin/*/export") AND status=200🔗 References
- https://github.com/OpenMage/magento-lts/commit/9cf8c0aa1d1306051a18ace08d40279dadc1fb35
- https://github.com/OpenMage/magento-lts/releases/tag/v19.4.10
- https://github.com/OpenMage/magento-lts/security/advisories/GHSA-52c6-6v3v-f3fg
- https://github.com/OpenMage/magento-lts/commit/9cf8c0aa1d1306051a18ace08d40279dadc1fb35
- https://github.com/OpenMage/magento-lts/releases/tag/v19.4.10
- https://github.com/OpenMage/magento-lts/security/advisories/GHSA-52c6-6v3v-f3fg
