CVE-2025-39349
📋 TL;DR
CVE-2025-39349 is a PHP object injection vulnerability in the CiyaShop WordPress theme that allows attackers to execute arbitrary code through deserialization of untrusted data. This affects all WordPress sites using CiyaShop theme versions up to 4.18.0. Successful exploitation could lead to complete site compromise.
💻 Affected Systems
- Potenzaglobalsolutions CiyaShop WordPress Theme
📦 What is this software?
Ciyashop by Potenzaglobalsolutions
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full server compromise, data theft, malware deployment, and complete site takeover.
Likely Case
Arbitrary code execution within WordPress context, allowing plugin/theme installation, admin user creation, and data manipulation.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though deserialization vulnerabilities are often severe.
🎯 Exploit Status
Deserialization vulnerabilities in WordPress themes are commonly exploited. CVSS 9.8 indicates critical severity with low attack complexity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 4.18.0
Vendor Advisory: https://patchstack.com/database/wordpress/theme/ciyashop/vulnerability/wordpress-ciyashop-theme-4-18-0-php-object-injection-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Appearance > Themes. 3. Check for CiyaShop theme update notification. 4. Update to latest version. 5. If no update available, remove CiyaShop theme immediately.
🔧 Temporary Workarounds
Disable CiyaShop Theme
allSwitch to default WordPress theme to remove vulnerable component
wp theme activate twentytwentyfour
wp theme delete ciyashop
Web Application Firewall Rule
allBlock requests containing serialized PHP objects in POST data
ModSecurity rule: SecRule ARGS "@rx O:[0-9]+:" "id:1001,phase:2,deny,msg:'PHP Object Injection Attempt'"
WAF configuration to block suspicious serialized data patterns
🧯 If You Can't Patch
- Immediately disable or remove CiyaShop theme and switch to a secure alternative.
- Implement strict input validation and sanitization for all user-controlled data in WordPress.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes for CiyaShop version. If version is 4.18.0 or lower, system is vulnerable.Check Version:
wp theme list --name=ciyashop --field=versionVerify Fix Applied:
Verify CiyaShop theme version is higher than 4.18.0 in WordPress admin panel or via wp theme list command.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress endpoints
- PHP errors related to unserialize() function
- Unexpected file creation in wp-content directory
Network Indicators:
- HTTP requests containing serialized PHP objects (O:8:"stdClass":)
- Unusual traffic to theme-specific endpoints
SIEM Query:
source="wordpress.log" AND ("unserialize" OR "O:" AND "{") AND status=200