CVE-2025-7099
📋 TL;DR
This vulnerability in BoyunCMS allows remote attackers to execute arbitrary code through deserialization of untrusted data in the installation handler. It affects BoyunCMS versions up to 1.21 running on PHP7. The attack targets the installation component, which is typically accessible during initial setup.
💻 Affected Systems
- BoyunCMS
📦 What is this software?
Boyuncms by Boyuncms Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, and potential lateral movement within the network.
Likely Case
Unauthorized access to the database and web server, allowing data manipulation or extraction.
If Mitigated
Limited impact if installation files are removed after setup and proper input validation is implemented.
🎯 Exploit Status
Exploit has been publicly disclosed and targets the installation handler. Attack complexity is described as high but exploit is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None provided in references
Restart Required: No
Instructions:
1. Check if BoyunCMS version is 1.21 or earlier. 2. Remove or restrict access to install/install2.php file. 3. Consider upgrading if newer version becomes available. 4. Review and sanitize all user inputs in the application.
🔧 Temporary Workarounds
Remove installation files
linuxDelete or restrict access to the vulnerable installation files after setup is complete
rm -rf install/
chmod 000 install/install2.php
Input validation hardening
allImplement strict input validation for all user-controlled parameters
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block deserialization attempts
- Restrict network access to the installation interface using firewall rules
🔍 How to Verify
Check if Vulnerable:
Check if BoyunCMS version is ≤1.21 and if install/install2.php file exists and is accessibleCheck Version:
Check BoyunCMS configuration files or admin panel for version informationVerify Fix Applied:
Verify install/install2.php is removed or inaccessible, and test with known exploit payloads📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to install/install2.php
- Deserialization errors in PHP logs
- Unexpected database connection attempts
Network Indicators:
- HTTP requests to install/install2.php with serialized data in parameters
- Unusual outbound connections from web server
SIEM Query:
source="web_logs" AND uri="/install/install2.php" AND (method="POST" OR parameters CONTAINS "db_host")