CVE-2022-2073
📋 TL;DR
CVE-2022-2073 is a code injection vulnerability in Grav CMS that allows attackers to execute arbitrary code on affected systems. This affects Grav installations prior to version 1.7.34. The vulnerability can be exploited through improper input handling in the CMS.
💻 Affected Systems
- Grav CMS
📦 What is this software?
Grav by Getgrav
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution, data theft, and potential lateral movement within the network.
Likely Case
Website defacement, data manipulation, or installation of backdoors/malware on the Grav CMS instance.
If Mitigated
Limited impact with proper input validation and output encoding, potentially only affecting the Grav application itself.
🎯 Exploit Status
Exploitation requires some level of access to the CMS interface, but the vulnerability is well-documented in public repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.7.34
Vendor Advisory: https://github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83
Restart Required: No
Instructions:
1. Backup your Grav installation. 2. Update Grav to version 1.7.34 or later using the Grav Package Manager (GPM) or by downloading from GitHub. 3. Clear the Grav cache.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement strict input validation and output encoding for user-controlled data
🧯 If You Can't Patch
- Implement strict WAF rules to block suspicious input patterns
- Restrict access to Grav admin interface to trusted IP addresses only
🔍 How to Verify
Check if Vulnerable:
Check Grav version in admin panel or via CLI: php bin/gpm versionCheck Version:
php bin/gpm versionVerify Fix Applied:
Confirm version is 1.7.34 or higher using the same commands📡 Detection & Monitoring
Log Indicators:
- Unusual PHP execution patterns in Grav logs
- Suspicious input containing code injection attempts
Network Indicators:
- Unexpected outbound connections from Grav server
- Unusual traffic to Grav admin endpoints
SIEM Query:
source="grav.log" AND ("eval" OR "system" OR "exec" OR suspicious_input_pattern)