CVE-2023-30130
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on CraftCMS servers through server-side template injection in the Section parameter. It affects CraftCMS version 3.8.1 installations, potentially compromising web servers and their data.
💻 Affected Systems
- CraftCMS
📦 What is this software?
Craft Cms by Craftcms
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise leading to data theft, malware deployment, lateral movement within network, and complete system control.
Likely Case
Webshell installation, data exfiltration, and privilege escalation on the affected web server.
If Mitigated
Limited impact due to network segmentation, minimal privileges, and monitoring catching exploitation attempts.
🎯 Exploit Status
Exploit details are publicly documented; weaponization is likely due to the high impact and low complexity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.8.2 or later
Vendor Advisory: https://craftcms.com/
Restart Required: No
Instructions:
1. Backup your CraftCMS installation and database. 2. Update CraftCMS to version 3.8.2 or later via the control panel or Composer. 3. Verify the update completed successfully.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to block malicious Section parameter values.
Modify CraftCMS code to sanitize Section parameter inputs before processing.
🧯 If You Can't Patch
- Implement a web application firewall (WAF) with rules to block template injection patterns.
- Restrict network access to the CraftCMS instance and monitor for suspicious activity.
🔍 How to Verify
Check if Vulnerable:
Check CraftCMS version in admin panel or via Composer; if version is 3.8.1, it is vulnerable.Check Version:
composer show craftcms/craft --format=json | grep versionVerify Fix Applied:
Confirm CraftCMS version is 3.8.2 or later after update.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to CraftCMS with crafted Section parameters
- Error logs showing template execution failures
Network Indicators:
- Suspicious outbound connections from web server post-exploit
SIEM Query:
source="craftcms.logs" AND (Section:*{{* OR Section:*}}*)