CVE-2025-20280
📋 TL;DR
An authenticated attacker with administrative credentials can inject malicious scripts into Cisco EPNM/Prime Infrastructure web interface fields, which then execute in victims' browsers when they view those pages. This stored XSS vulnerability affects users of the management interface and could lead to session hijacking or data theft. Only systems running vulnerable versions of Cisco EPNM or Prime Infrastructure are affected.
💻 Affected Systems
- Cisco Evolved Programmable Network Manager (EPNM)
- Cisco Prime Infrastructure
📦 What is this software?
Evolved Programmable Network Manager by Cisco
View all CVEs affecting Evolved Programmable Network Manager →
⚠️ Risk & Real-World Impact
Worst Case
Administrator credentials compromised, leading to full system takeover, data exfiltration, or lateral movement within the network.
Likely Case
Session hijacking of other administrators, theft of sensitive information displayed in the web interface, or unauthorized configuration changes.
If Mitigated
Limited impact due to proper input validation, output encoding, and strict access controls preventing successful exploitation.
🎯 Exploit Status
Requires administrative credentials and knowledge of vulnerable input fields; stored XSS persists until cleaned
🛠️ 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-epnm-pi-stored-xss-XjQZsyCP
Restart Required: No
Instructions:
1. Review Cisco advisory for affected versions. 2. Download and apply the appropriate patch from Cisco. 3. Verify the patch installation. 4. Test functionality after patching.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement additional input validation on all user-supplied fields in the web interface
Configuration varies by deployment - consult Cisco documentation
Content Security Policy (CSP)
allImplement strict CSP headers to mitigate XSS impact
Add CSP headers via web server configuration or application settings
🧯 If You Can't Patch
- Restrict administrative access to only trusted users and networks
- Implement web application firewall (WAF) with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check current software version against affected versions in Cisco advisoryCheck Version:
Check via web interface: Admin > System > Software Update or CLI: show versionVerify Fix Applied:
Verify installed version matches or exceeds patched version from advisory📡 Detection & Monitoring
Log Indicators:
- Unusual administrative login patterns
- Suspicious input in web interface fields
- JavaScript execution errors in web logs
Network Indicators:
- Unexpected outbound connections from management interface
- Suspicious payloads in HTTP requests to vulnerable endpoints
SIEM Query:
source="cisco_epnm_logs" OR source="cisco_prime_logs" AND (event_type="admin_login" OR event_type="input_validation") AND suspicious_pattern=*