CVE-2023-29855
📋 TL;DR
WBCE CMS 1.5.3 contains a command injection vulnerability in admin/languages/install.php that allows authenticated attackers to execute arbitrary commands on the server. This affects all WBCE CMS installations running version 1.5.3 with the vulnerable file accessible. Attackers with admin access can exploit this to gain full system control.
💻 Affected Systems
- WBCE CMS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise leading to data theft, ransomware deployment, or use as a foothold for lateral movement within the network.
Likely Case
Attackers with admin credentials execute commands to install backdoors, steal sensitive data, or deface websites.
If Mitigated
With proper access controls and network segmentation, impact limited to the web server environment.
🎯 Exploit Status
Exploitation requires admin credentials but is straightforward once authenticated. Public GitHub issue demonstrates the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.5.4 or later
Vendor Advisory: https://github.com/WBCE/WBCE_CMS/issues/544
Restart Required: No
Instructions:
1. Backup your WBCE installation. 2. Download WBCE CMS 1.5.4 or later from the official repository. 3. Replace the vulnerable admin/languages/install.php file with the patched version. 4. Verify no custom modifications are overwritten.
🔧 Temporary Workarounds
Remove vulnerable file
linuxDelete or rename the vulnerable install.php file to prevent exploitation
rm /path/to/wbce/admin/languages/install.php
Restrict file access
allUse .htaccess or web server configuration to block access to the vulnerable file
<Files "install.php">
Order Allow,Deny
Deny from all
</Files>
🧯 If You Can't Patch
- Implement strict access controls and multi-factor authentication for admin accounts
- Deploy web application firewall (WAF) rules to block command injection patterns
🔍 How to Verify
Check if Vulnerable:
Check if admin/languages/install.php exists in your WBCE installation and review version numberCheck Version:
grep -r "define.*VERSION" /path/to/wbce/ | grep -i versionVerify Fix Applied:
Verify admin/languages/install.php has been updated or removed, and confirm WBCE version is 1.5.4+📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to admin/languages/install.php
- System commands executed from web process
- Unexpected process spawns from web server user
Network Indicators:
- Outbound connections from web server to unexpected destinations
- Command and control traffic patterns
SIEM Query:
source="web_logs" AND uri="/admin/languages/install.php" AND (method="POST" OR params CONTAINS "system" OR params CONTAINS "exec")