CVE-2025-41745

Q: What is the severity of CVE-2025-41745?

CVE-2025-41745 has a CVSS score of 7.1 (HIGH). An unauthenticated cross-site scripting (XSS) vulnerability in pxc_portCntr2.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 the web interface exposed. The vulnerability does not grant system-level access or session hijacking capabilities due to httpOnly cookie protection.

7.1 HIGH

Cross-Site Scripting

📋 TL;DR

An unauthenticated cross-site scripting (XSS) vulnerability in pxc_portCntr2.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 the web interface exposed. The vulnerability does not grant system-level access or session hijacking capabilities due to httpOnly cookie protection.

💻 Affected Systems

Products:

Software using pxc_portCntr2.php component

Versions: Unknown - check vendor advisory

Operating Systems: All platforms running vulnerable software

Default Config Vulnerable: ⚠️ Yes

Notes: Requires web-based management interface to be accessible and users to be authenticated.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Attackers could manipulate device configuration to disrupt operations, change network settings, or enable further attacks by modifying authorized parameters.

🟠

Likely Case

Attackers trick users into changing specific configuration settings, potentially causing service disruption or misconfiguration.

🟢

If Mitigated

With proper input validation and output encoding, the attack would fail to execute malicious scripts.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Requires social engineering to trick authenticated users into interacting with malicious content.

🛠️ 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 patch release. 2. Apply patch when available. 3. Verify fix by testing XSS payloads.

🔧 Temporary Workarounds

Input Validation and Output Encoding

all

Implement proper input validation and output encoding in pxc_portCntr2.php

Not applicable - code modification required

Web Application Firewall (WAF)

all

Deploy WAF with XSS protection rules

Not applicable - configuration required

🧯 If You Can't Patch

Restrict access to web management interface to trusted networks only
Implement Content Security Policy (CSP) headers to mitigate XSS impact

🔍 How to Verify

Check if Vulnerable:

Test pxc_portCntr2.php endpoint with XSS payloads and check if scripts execute

Check Version:

Check software version via web interface or system documentation

Verify Fix Applied:

Retest with XSS payloads after applying fixes to confirm scripts no longer execute

📡 Detection & Monitoring

Log Indicators:

Unusual POST requests to pxc_portCntr2.php with script tags or encoded payloads
Configuration changes from unexpected sources

Network Indicators:

HTTP requests containing XSS patterns to vulnerable endpoint
External sources triggering authenticated user actions

SIEM Query:

source="web_logs" AND uri="/pxc_portCntr2.php" AND (content CONTAINS "<script>" OR content CONTAINS "javascript:")

📊 Metadata

CVE ID: CVE-2025-41745

CVSS v3 Score: 7.1 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

CWE: CWE-79

EPSS Score: 0.1% exploit probability (26.7th percentile)

Published: December 9, 2025

Last Updated: December 19, 2025

🔗 References

https://certvde.com/de/advisories/VDE-2025-071 Vendor Advisory

📋 TL;DR

💻 Affected Systems

📦 What is this software?

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