CVE-2025-1186
📋 TL;DR
This critical vulnerability in XunRuiCMS allows remote attackers to execute arbitrary code through deserialization of the 'thumb' parameter in the Api.php file. Attackers can exploit this without authentication to potentially take full control of affected systems. All users running XunRuiCMS versions up to 4.6.4 are affected.
💻 Affected Systems
- dayrui XunRuiCMS
📦 What is this software?
Xunruicms by Xunruicms
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing remote code execution, data theft, and persistent backdoor installation.
Likely Case
Remote code execution leading to web server compromise, data exfiltration, and lateral movement within the network.
If Mitigated
Attack blocked at perimeter with proper input validation and deserialization controls in place.
🎯 Exploit Status
Exploit details have been publicly disclosed in GitHub repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
Check vendor website for security updates. If patch is released, update to the latest version immediately.
🔧 Temporary Workarounds
Restrict Access to Api.php
allBlock access to the vulnerable file using web server configuration or firewall rules.
# Apache: RewriteEngine On
RewriteRule ^Control/Api/Api\.php$ - [F,L]
# Nginx: location ~ ^/Control/Api/Api\.php$ { deny all; }
Input Validation Filter
allAdd validation to reject deserialization attempts on the thumb parameter.
# In Api.php, add input sanitization before deserialization
🧯 If You Can't Patch
- Implement strict WAF rules to block requests containing serialized objects in the thumb parameter.
- Isolate the XunRuiCMS instance in a segmented network with strict outbound traffic controls.
🔍 How to Verify
Check if Vulnerable:
Check if /Control/Api/Api.php exists and examine version in system configuration files.Check Version:
Check config files or admin panel for XunRuiCMS version number.Verify Fix Applied:
Verify Api.php file has been updated with proper input validation or access restrictions.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /Control/Api/Api.php with serialized data in thumb parameter
- Unusual PHP process execution patterns
Network Indicators:
- POST requests to vulnerable endpoint with serialized payloads
- Outbound connections from web server to unknown IPs
SIEM Query:
source="web_logs" AND uri="/Control/Api/Api.php" AND (thumb CONTAINS "O:" OR thumb CONTAINS "C:")