CVE-2025-20374
📋 TL;DR
This vulnerability allows authenticated administrators in Cisco Unified CCX web UI to perform directory traversal attacks, potentially accessing arbitrary files on the underlying operating system. Only systems running vulnerable versions of Cisco Unified CCX are affected, and exploitation requires administrative credentials.
💻 Affected Systems
- Cisco Unified Contact Center Express (Unified CCX)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Administrator with malicious intent could read sensitive system files, configuration files, or credential files, potentially leading to full system compromise.
Likely Case
Malicious administrator or compromised admin account could access sensitive configuration data, logs, or other files that shouldn't be accessible via the web UI.
If Mitigated
With proper access controls and monitoring, impact is limited to authorized administrators accessing files they shouldn't be able to reach through the web interface.
🎯 Exploit Status
Exploitation requires administrative credentials and knowledge of directory traversal techniques; no public exploit code mentioned in CVE.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Cisco advisory for specific fixed versions
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cc-mult-vuln-gK4TFXSn
Restart Required: Yes
Instructions:
1. Review Cisco advisory for affected versions. 2. Download and apply the appropriate patch from Cisco. 3. Restart the Unified CCX service or system as required. 4. Verify the patch is applied successfully.
🔧 Temporary Workarounds
Restrict Administrative Access
allLimit administrative access to only trusted personnel and implement multi-factor authentication for admin accounts.
Network Segmentation
allPlace Cisco Unified CCX systems in isolated network segments with strict firewall rules limiting access to administrative interfaces.
🧯 If You Can't Patch
- Implement strict monitoring of administrative access and file access patterns
- Regularly audit administrative accounts and remove unnecessary privileges
🔍 How to Verify
Check if Vulnerable:
Check Cisco Unified CCX version against affected versions listed in Cisco advisoryCheck Version:
Check via Cisco Unified CCX web UI or CLI; specific command varies by versionVerify Fix Applied:
Verify the system is running a patched version not listed as vulnerable in the advisory📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns via web UI
- Multiple failed directory traversal attempts
- Administrative access from unusual locations/times
Network Indicators:
- HTTP requests with directory traversal patterns (../ sequences) to admin endpoints
- Unusual file download patterns from web UI
SIEM Query:
web_ui_access AND (uri CONTAINS ".." OR uri CONTAINS "%2e%2e") AND user_role="admin"