CVE-2025-55254 – This vulnerability in HCL BigFix Remote Control... (How to Fix)

Q: What is the severity of CVE-2025-55254?

CVE-2025-55254 has a CVSS score of 3.7 (LOW). This vulnerability in HCL BigFix Remote Control Lite Web Portal allows attackers to execute malicious code by exploiting improper path-relative stylesheet import handling. It affects web portal versions 10.1.0.0326 and lower. Attackers could potentially compromise the web interface through crafted web pages.

📋 TL;DR

This vulnerability in HCL BigFix Remote Control Lite Web Portal allows attackers to execute malicious code by exploiting improper path-relative stylesheet import handling. It affects web portal versions 10.1.0.0326 and lower. Attackers could potentially compromise the web interface through crafted web pages.

💻 Affected Systems

Products:

HCL BigFix Remote Control Lite Web Portal

Versions: 10.1.0.0326 and lower

Operating Systems: Windows, Linux

Default Config Vulnerable: ⚠️ Yes

Notes: Only affects the web portal component, not the full Remote Control application.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution on the web server, potentially leading to full system compromise and lateral movement within the network.

🟠

Likely Case

Limited code execution within web context, potentially stealing session data or performing client-side attacks against users.

🟢

If Mitigated

Minimal impact if web portal is isolated, properly segmented, and access is restricted to trusted users only.

🌐 Internet-Facing: HIGH - Web portals exposed to internet are directly accessible to attackers.

🏢 Internal Only: MEDIUM - Internal attackers or compromised internal systems could exploit this vulnerability.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Exploitation requires attacker to craft malicious web pages that trigger the stylesheet import vulnerability.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 10.1.0.0327 or higher

Vendor Advisory: https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0127332

Restart Required: Yes

Instructions:

1. Download patch from HCL support portal. 2. Backup current installation. 3. Apply patch following vendor instructions. 4. Restart web portal service. 5. Verify version is 10.1.0.0327 or higher.

🔧 Temporary Workarounds

Network Segmentation

all

Restrict access to web portal using firewall rules to only trusted IP addresses.

Web Application Firewall

all

Deploy WAF with rules to detect and block path traversal attempts.

🧯 If You Can't Patch

Isolate the web portal in a dedicated network segment with strict access controls
Implement strong authentication and monitor for suspicious web requests

🔍 How to Verify

Check if Vulnerable:

Check web portal version in administration interface or via installed software list.

Check Version:

Check web portal admin interface or consult vendor documentation for version check command.

Verify Fix Applied:

Confirm version is 10.1.0.0327 or higher and test web portal functionality.

📡 Detection & Monitoring

Log Indicators:

Unusual stylesheet import requests
Path traversal patterns in web logs
Multiple failed import attempts

Network Indicators:

HTTP requests with unusual path parameters
Requests attempting to access parent directories

SIEM Query:

source="web_logs" AND (url="*../*" OR url="*stylesheet*" OR status=500)

📊 Metadata

CVE ID: CVE-2025-55254

CVSS v3 Score: 3.7 (LOW)

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

CWE: CWE-601

EPSS Score: 0.04% exploit probability (12.8th percentile)

Published: December 17, 2025

Last Updated: January 6, 2026

🔗 References

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0127332 Vendor Advisory

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