CVE-2023-39796
📋 TL;DR
This SQL injection vulnerability in WBCE CMS's miniform module allows remote unauthenticated attackers to execute arbitrary SQL commands via the DB_RECORD_TABLE parameter. Attackers can potentially read, modify, or delete database content, and in some configurations execute operating system commands. All WBCE CMS v1.6.0 installations with the miniform module are affected.
💻 Affected Systems
- WBCE CMS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via SQL injection leading to remote code execution, data exfiltration, and persistent backdoor installation.
Likely Case
Database compromise allowing data theft, modification, or deletion of CMS content and user data.
If Mitigated
Limited impact with proper input validation and database permissions, potentially only error messages or partial data exposure.
🎯 Exploit Status
Proof of concept code is publicly available on Pastebin. The vulnerability requires no authentication and has simple exploitation vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.1
Vendor Advisory: https://forum.wbce.org/viewtopic.php?pid=42046#p42046
Restart Required: No
Instructions:
1. Backup your WBCE CMS installation and database. 2. Download WBCE CMS v1.6.1 from GitHub releases. 3. Replace the miniform module files with the patched version. 4. Verify the patch is applied by checking the module version.
🔧 Temporary Workarounds
Disable miniform module
allTemporarily disable the vulnerable miniform module to prevent exploitation.
Navigate to WBCE CMS admin panel > Modules > Miniform > Deactivate
Web Application Firewall (WAF) rules
allImplement WAF rules to block SQL injection attempts targeting DB_RECORD_TABLE parameter.
Add rule: Block requests containing SQL injection patterns in DB_RECORD_TABLE parameter
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries for all miniform database interactions.
- Restrict network access to the CMS instance using firewall rules to limit exposure.
🔍 How to Verify
Check if Vulnerable:
Check if running WBCE CMS v1.6.0 and if miniform module is active in the admin panel.Check Version:
Check /admin/settings/info.php or view the footer in admin panel for version information.Verify Fix Applied:
Verify WBCE CMS version is 1.6.1 or higher and check miniform module files have been updated.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts after SQL errors
- Requests with suspicious DB_RECORD_TABLE parameter values
Network Indicators:
- HTTP requests containing SQL keywords in DB_RECORD_TABLE parameter
- Unusual outbound database connections from web server
SIEM Query:
source="web_logs" AND (DB_RECORD_TABLE CONTAINS "UNION" OR DB_RECORD_TABLE CONTAINS "SELECT" OR DB_RECORD_TABLE CONTAINS "INSERT")