CVE-2018-18941
📋 TL;DR
CVE-2018-18941 is a critical information disclosure vulnerability in Vignette Content Management version 6 that exposes administrator passwords in HTML source code. Attackers can use these credentials to create privileged accounts and gain full administrative control. This affects all users of the discontinued Vignette Content Management 6 product.
💻 Affected Systems
- Vignette Content Management
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the content management system with administrative privileges, allowing data theft, content manipulation, and potential lateral movement to connected systems.
Likely Case
Unauthorized administrative access leading to content manipulation, user account creation, and potential data exfiltration.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external exploitation.
🎯 Exploit Status
Exploitation requires viewing HTML source of specific admin page and using discovered credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None - product discontinued
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch exists. Consider migration to supported alternatives.
🔧 Temporary Workarounds
Remove vulnerable endpoint
allDelete or restrict access to the vulnerable HTML file containing admin credentials
rm /path/to/vgn/ccb/user/mgmt/user/edit/0,1628,0,00.html
Implement strict access controls
allRestrict access to admin interfaces using network segmentation and authentication
🧯 If You Can't Patch
- Immediately change all administrator passwords and implement strong password policies
- Isolate the Vignette system from internet access and implement strict network segmentation
🔍 How to Verify
Check if Vulnerable:
Access http://[target]/vgn/ccb/user/mgmt/user/edit/0,1628,0,00.html?uid=admin and view page source to check for exposed credentialsCheck Version:
Check product documentation or admin interface for version informationVerify Fix Applied:
Verify the vulnerable file no longer exists or returns access denied errors📡 Detection & Monitoring
Log Indicators:
- Unusual admin login attempts
- Access to vulnerable endpoint
- New privileged user creation
Network Indicators:
- HTTP requests to /vgn/ccb/user/mgmt/user/edit/0,1628,0,00.html
- Unauthorized admin interface access
SIEM Query:
sourceIP=* AND (uri="/vgn/ccb/user/mgmt/user/edit/0,1628,0,00.html" OR event="admin login")