CVE-2023-53872
📋 TL;DR
CVE-2023-53872 is an OS command injection vulnerability in Wp2Fac 1.0 that allows remote attackers to execute arbitrary system commands on the server. Attackers can inject shell commands through the 'numara' parameter in the send.php endpoint. This affects all users running Wp2Fac 1.0 with the vulnerable endpoint exposed.
💻 Affected Systems
- Wp2Fac
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise leading to data theft, ransomware deployment, lateral movement within the network, and persistent backdoor installation.
Likely Case
Remote code execution allowing attackers to steal sensitive data, deface websites, or use the server for cryptocurrency mining or DDoS attacks.
If Mitigated
Limited impact if proper network segmentation, web application firewalls, and least privilege principles are implemented.
🎯 Exploit Status
Exploit code is publicly available on Exploit-DB and GitHub. The vulnerability requires no authentication and can be exploited with simple HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: N/A
Restart Required: No
Instructions:
1. Remove Wp2Fac 1.0 from your system immediately. 2. Check for any unauthorized modifications or backdoors. 3. Consider alternative software solutions.
🔧 Temporary Workarounds
Block send.php endpoint
allPrevent access to the vulnerable endpoint using web server configuration or firewall rules.
# Apache: RewriteRule ^send\.php$ - [F,L]
# Nginx: location ~ /send\.php$ { deny all; }
Input validation and sanitization
allImplement strict input validation for the 'numara' parameter to reject any shell metacharacters.
# PHP example: if (preg_match('/[;&|`$]/', $_POST['numara'])) { die('Invalid input'); }
🧯 If You Can't Patch
- Immediately disable or remove Wp2Fac 1.0 from production systems.
- Implement network segmentation to isolate affected systems and deploy a web application firewall with command injection rules.
🔍 How to Verify
Check if Vulnerable:
Check if send.php endpoint exists and is accessible. Test by sending a request with 'numara' parameter containing shell metacharacters like '& whoami'.Check Version:
# Check Wp2Fac version in PHP files: grep -r 'version\|Version' /path/to/wp2fac/Verify Fix Applied:
Verify that send.php endpoint is no longer accessible or properly sanitizes input. Test with the same payloads that would trigger the vulnerability.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to send.php with shell metacharacters in parameters
- Suspicious system commands in web server logs
- Multiple failed exploitation attempts
Network Indicators:
- HTTP requests to send.php with 'numara' parameter containing '&', ';', '|', or backticks
- Outbound connections from web server to suspicious IPs
SIEM Query:
source="web_server" AND uri="/send.php" AND (param="numara" AND value MATCHES "[;&|`$]")