CVE-2025-20330
📋 TL;DR
An unauthenticated cross-site scripting (XSS) vulnerability in Cisco Unified Communications Manager IM & Presence Service web interface allows attackers to execute malicious scripts in users' browsers. This affects administrators and users accessing the management interface. Attackers can steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- Cisco Unified Communications Manager IM & Presence Service
📦 What is this software?
Unified Communications Manager Im And Presence Service by Cisco
View all CVEs affecting Unified Communications Manager Im And Presence Service →
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains administrative access to the Unified CM IM&P system, leading to complete compromise of communications infrastructure, data theft, and further network penetration.
Likely Case
Session hijacking leading to unauthorized access to the management interface, potential data exfiltration, and privilege escalation within the system.
If Mitigated
Limited impact due to network segmentation, proper access controls, and user awareness preventing successful social engineering attacks.
🎯 Exploit Status
Requires social engineering to persuade user to click malicious link; no authentication needed for initial attack vector
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Cisco advisory for specific patched versions
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-imp-xss-XQgu4HSG
Restart Required: No
Instructions:
1. Review Cisco advisory for affected versions 2. Download and apply appropriate patch from Cisco 3. Verify patch installation 4. Test management interface functionality
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement additional input validation and output encoding for web interface parameters
🧯 If You Can't Patch
- Implement strict network segmentation to isolate management interfaces from untrusted networks
- Deploy web application firewall (WAF) with XSS protection rules and conduct user security awareness training about phishing risks
🔍 How to Verify
Check if Vulnerable:
Check Cisco Unified CM IM&P version against advisory; test web interface for input validation weaknessesCheck Version:
Check version via Cisco Unified CM IM&P administration interface or CLIVerify Fix Applied:
Verify installed version matches patched version from advisory; test XSS payloads no longer execute📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to management interface
- Multiple failed login attempts followed by successful access
- Suspicious URL parameters in web server logs
Network Indicators:
- Unusual outbound connections from management interface
- Traffic patterns suggesting session hijacking
SIEM Query:
Search for: web_interface_access AND (suspicious_parameters OR multiple_failed_logins)