CVE-2025-25692
📋 TL;DR
A PHAR deserialization vulnerability in PrestaShop v8.2.0 allows attackers to execute arbitrary code on the server by sending a specially crafted POST request. This affects all websites running PrestaShop v8.2.0 with the vulnerable function exposed. Attackers can potentially gain full control of the affected e-commerce system.
💻 Affected Systems
- PrestaShop
📦 What is this software?
Prestashop by Prestashop
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise leading to data theft, malware deployment, and persistent backdoor installation
Likely Case
Remote code execution allowing website defacement, data exfiltration, and credential harvesting
If Mitigated
Limited impact with proper WAF rules and input validation blocking malicious requests
🎯 Exploit Status
Exploitation requires sending a crafted POST request to the vulnerable endpoint; no authentication needed
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v8.2.1 or later
Vendor Advisory: http://prestashop.com
Restart Required: No
Instructions:
1. Backup your PrestaShop installation and database. 2. Download the latest version from PrestaShop's official website. 3. Replace the vulnerable files with patched versions. 4. Clear cache and verify functionality.
🔧 Temporary Workarounds
Disable PHAR deserialization
allModify PHP configuration to disable PHAR deserialization
php -d phar.readonly=1
Input validation filter
allAdd input validation to block malicious POST requests
Add validation in _getHeaders function to sanitize input
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to block suspicious POST requests containing PHAR indicators
- Restrict access to the vulnerable endpoint using IP whitelisting or authentication requirements
🔍 How to Verify
Check if Vulnerable:
Check if PrestaShop version is exactly 8.2.0 by examining the configuration file or admin panelCheck Version:
grep -r '_PS_VERSION_' config/settings.inc.phpVerify Fix Applied:
Verify version is updated to 8.2.1 or later and test with known exploit payloads📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to _getHeaders function
- PHP errors related to deserialization
- Unexpected file operations
Network Indicators:
- POST requests with PHAR:// strings
- Unusual outbound connections from web server
SIEM Query:
source="web_logs" AND (POST AND "_getHeaders" AND "PHAR")