CVE-2025-20356
📋 TL;DR
An authenticated cross-site scripting (XSS) vulnerability in Cisco Cyber Vision Center's web management interface allows attackers with administrative access to inject malicious scripts. This could lead to session hijacking, data theft, or unauthorized actions within the interface. Only authenticated users with access to the Sensor Explorer page are affected.
💻 Affected Systems
- Cisco Cyber Vision Center
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals administrator session cookies, gains full control of the Cyber Vision Center, accesses sensitive network visibility data, and pivots to other systems.
Likely Case
Attacker performs session hijacking to view sensitive network monitoring data or modifies configuration settings.
If Mitigated
Limited impact due to proper access controls, network segmentation, and input validation at other layers.
🎯 Exploit Status
Requires valid administrative credentials and access to specific interface pages. Exploitation involves injecting script payloads into vulnerable input fields.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.3.0
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cv-xss-rwRAKAJ9
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download Cisco Cyber Vision Center 4.3.0 from Cisco Software Center. 3. Follow Cisco's upgrade documentation for appliance deployment. 4. Verify upgrade completion and functionality.
🔧 Temporary Workarounds
Restrict User Access
allLimit Sensor Explorer page access to only essential administrators
Configure user roles to remove Sensor Explorer access from non-essential accounts
Implement Web Application Firewall
allDeploy WAF with XSS protection rules in front of Cyber Vision Center
🧯 If You Can't Patch
- Implement strict access controls and principle of least privilege for all administrative accounts
- Deploy network segmentation to isolate Cyber Vision Center from other critical systems
🔍 How to Verify
Check if Vulnerable:
Check Cyber Vision Center version via web interface: Admin > System > About. Versions below 4.3.0 are vulnerable.Check Version:
Not applicable - check via web interface onlyVerify Fix Applied:
Verify version is 4.3.0 or higher in Admin > System > About page.📡 Detection & Monitoring
Log Indicators:
- Unusual administrative login patterns
- Multiple failed login attempts followed by successful login
- Unexpected configuration changes
Network Indicators:
- Suspicious HTTP requests containing script tags or JavaScript payloads to Sensor Explorer endpoints
SIEM Query:
source="cisco_cyber_vision" AND (http_uri="*sensor*" AND http_query="*<script>*" OR http_query="*javascript:*")