CVE-2025-2150
📋 TL;DR
HGiga C&Cm@il has a stored XSS vulnerability where authenticated users can embed malicious JavaScript in emails. When recipients view these emails, the script executes in their browser context. This affects organizations using vulnerable versions of HGiga's C&Cm@il email system.
💻 Affected Systems
- HGiga C&Cm@il
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as the victim, redirect to phishing sites, or install malware through the victim's browser.
Likely Case
Session hijacking, credential theft, or unauthorized actions performed in the victim's context within the email system.
If Mitigated
Limited to same-origin actions within the email application if proper CSP and input validation are implemented.
🎯 Exploit Status
Requires authenticated user access; exploitation is straightforward once access is obtained
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-10005-05e0f-2.html
Restart Required: Yes
Instructions:
1. Contact HGiga for patch details. 2. Apply the security update. 3. Restart C&Cm@il services. 4. Test email functionality.
🔧 Temporary Workarounds
Content Security Policy (CSP)
allImplement strict CSP headers to block inline scripts and restrict script sources
Add 'Content-Security-Policy: script-src 'self';' to web server headers
Input Validation
allSanitize all email content before storage and display
Implement HTML entity encoding for user-controlled content in email bodies
🧯 If You Can't Patch
- Restrict user permissions to minimize attack surface
- Monitor email logs for suspicious script patterns and implement web application firewall rules
🔍 How to Verify
Check if Vulnerable:
Test by creating an email with <script>alert('XSS')</script> in body and checking if it executes when viewedCheck Version:
Check C&Cm@il administration panel or contact HGiga support for version informationVerify Fix Applied:
Repeat vulnerability test after patch; script should be properly sanitized and not execute📡 Detection & Monitoring
Log Indicators:
- Unusual email creation patterns
- Emails containing script tags or JavaScript code
Network Indicators:
- Outbound connections to unexpected domains from email viewing sessions
SIEM Query:
source="C&Cm@il" AND (body="<script>" OR body="javascript:")