CVE-2025-41746
📋 TL;DR
An unauthenticated cross-site scripting (XSS) vulnerability in pxc_portSecCfg.php allows attackers to trick authenticated users into sending malicious POST requests that modify device configuration parameters via the web-based management interface. This affects systems running vulnerable versions of the software with web management enabled. The vulnerability does not allow system-level access or session hijacking due to httpOnly cookie protection.
💻 Affected Systems
- Unknown specific product - referenced as affected device with web-based management
📦 What is this software?
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⚠️ Risk & Real-World Impact
Worst Case
Attackers could modify critical device configuration parameters, potentially disrupting network operations or enabling further attacks by changing security settings.
Likely Case
Attackers modify non-critical configuration parameters, causing service disruptions or requiring administrative intervention to restore proper settings.
If Mitigated
With proper input validation and output encoding, the attack would fail to execute JavaScript payloads, preventing configuration changes.
🎯 Exploit Status
Exploitation requires social engineering to trick authenticated users into clicking malicious links.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://certvde.com/de/advisories/VDE-2025-071
Restart Required: No
Instructions:
1. Monitor vendor for security updates. 2. Apply patches when available. 3. Verify fix by testing the vulnerable endpoint.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement proper input validation and output encoding in pxc_portSecCfg.php to prevent XSS payload execution.
N/A - requires code changes
Restrict Web Interface Access
allLimit access to web-based management interface to trusted networks only.
N/A - network configuration dependent
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads targeting pxc_portSecCfg.php
- Educate users about phishing risks and implement click-through warnings for external links
🔍 How to Verify
Check if Vulnerable:
Test pxc_portSecCfg.php endpoint with XSS payloads to see if they execute in authenticated context.Check Version:
Unknown - check device documentation for version informationVerify Fix Applied:
Retest with XSS payloads after applying fixes to confirm they no longer execute.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to pxc_portSecCfg.php with script tags or JavaScript payloads
- Multiple configuration changes from single user session
Network Indicators:
- HTTP requests containing XSS payload patterns to the vulnerable endpoint
- Referrer headers pointing to suspicious external domains
SIEM Query:
http.url:"*pxc_portSecCfg.php*" AND (http.request_body:"<script>" OR http.request_body:"javascript:")