CVE-2025-20310
📋 TL;DR
A stored cross-site scripting (XSS) vulnerability in Cisco Enterprise Chat and Email web UI allows unauthenticated remote attackers to inject malicious scripts. When exploited, this could enable attackers to execute arbitrary code in users' browsers or steal sensitive information. Affected users include anyone using the vulnerable Cisco ECE interface.
💻 Affected Systems
- Cisco Enterprise Chat and Email (ECE)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full control of user sessions, steals credentials, performs actions as authenticated users, and potentially compromises the entire ECE system.
Likely Case
Attacker steals session cookies, performs limited actions as authenticated users, and accesses sensitive chat/email data.
If Mitigated
Attack limited to isolated browser session with minimal data exposure due to proper input validation and output encoding.
🎯 Exploit Status
Exploitation requires social engineering (user clicks crafted link) and valid agent credentials
🛠️ 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-ece-xss-CbtKtEYc
Restart Required: Yes
Instructions:
1. Review Cisco advisory for affected versions
2. Download and apply the latest patch from Cisco
3. Restart the ECE service
4. Verify the fix is applied
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement additional input validation and output encoding in web UI
Content Security Policy
allImplement strict Content Security Policy headers to limit script execution
🧯 If You Can't Patch
- Implement web application firewall (WAF) with XSS protection rules
- Restrict network access to ECE interface to trusted users only
🔍 How to Verify
Check if Vulnerable:
Check Cisco ECE version against advisory; test for XSS payload injection in web UI fieldsCheck Version:
Check ECE administration interface or consult Cisco documentation for version commandVerify Fix Applied:
Verify patch installation and test that XSS payloads are properly sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual script tags or JavaScript in user input logs
- Multiple failed login attempts followed by successful agent login
Network Indicators:
- Suspicious HTTP requests containing script payloads to ECE endpoints
SIEM Query:
source="ece_logs" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")