CVE-2024-6881
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in M-Files Hubshare allows authenticated attackers to inject malicious JavaScript that executes in other users' browsers when they view compromised content. It affects organizations using M-Files Hubshare versions before 5.0.6.0. Attackers must have authenticated access to the system to exploit this vulnerability.
💻 Affected Systems
- M-Files Hubshare
📦 What is this software?
Hubshare by M Files
⚠️ Risk & Real-World Impact
Worst Case
An authenticated malicious insider or compromised account could steal session cookies, perform actions as other users, redirect to phishing sites, or install malware on user systems.
Likely Case
Attackers with legitimate access could perform session hijacking, data theft, or deface content visible to other users within the application.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be rendered harmless as text rather than executable code.
🎯 Exploit Status
Requires authenticated access; exploitation involves injecting JavaScript payloads into content fields that are then rendered without proper sanitization.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.0.6.0
Vendor Advisory: https://empower.m-files.com/security-advisories/CVE-2024-6881
Restart Required: Yes
Instructions:
1. Download M-Files Hubshare version 5.0.6.0 or later from official M-Files sources. 2. Backup current installation and configuration. 3. Run the installer to upgrade to the patched version. 4. Restart the M-Files Hubshare service and verify functionality.
🔧 Temporary Workarounds
Input Validation Filtering
allImplement web application firewall rules or input validation to block JavaScript tags and event handlers in user content.
Content Security Policy
allImplement strict Content Security Policy headers to restrict script execution sources.
🧯 If You Can't Patch
- Restrict user permissions to minimize who can create or modify content where XSS could be injected.
- Implement network segmentation to isolate the M-Files Hubshare server from critical systems.
🔍 How to Verify
Check if Vulnerable:
Check the M-Files Hubshare version in the administration console or via the web interface. If version is below 5.0.6.0, the system is vulnerable.Check Version:
Check via M-Files Hubshare web interface: Admin Console → System Information → VersionVerify Fix Applied:
After patching, verify the version shows 5.0.6.0 or higher in the administration interface.📡 Detection & Monitoring
Log Indicators:
- Unusual content creation/modification patterns
- Multiple failed login attempts followed by content changes
- Log entries showing script tags or JavaScript in content fields
Network Indicators:
- HTTP requests containing suspicious script payloads in POST data
- Unusual outbound connections from user browsers after viewing Hubshare content
SIEM Query:
source="m-files-hubshare" AND (message="*<script>*" OR message="*javascript:*" OR message="*onerror=*" OR message="*onload=*")