CVE-2025-34406
📋 TL;DR
MailEnable versions before 10.54 contain a reflected XSS vulnerability in the Id parameter of /Mobile/ContactDetails.aspx. Attackers can craft malicious links that execute arbitrary JavaScript in victims' browsers when opened. This affects all MailEnable users running vulnerable versions who access the mobile interface.
💻 Affected Systems
- MailEnable
📦 What is this software?
Mailenable by Mailenable
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal session cookies, hijack authenticated sessions, redirect users to malicious sites, and perform actions as the authenticated user including data theft and account compromise.
Likely Case
Attackers use phishing emails with malicious links to steal session cookies, potentially gaining unauthorized access to email accounts and sensitive information.
If Mitigated
With HttpOnly cookies and proper input validation, impact is limited to client-side attacks like phishing and UI manipulation without session theft.
🎯 Exploit Status
Exploitation requires user interaction (clicking malicious link) but is straightforward once a payload is crafted. No authentication required to trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.54
Vendor Advisory: https://mailenable.com/Standard-ReleaseNotes.txt
Restart Required: Yes
Instructions:
1. Download MailEnable version 10.54 or later from the official website. 2. Run the installer to upgrade. 3. Restart MailEnable services. 4. Verify the fix by checking the version.
🔧 Temporary Workarounds
Disable Mobile Interface
windowsTemporarily disable the vulnerable Mobile interface component
Navigate to MailEnable Management Console > Services > Web Mail > Mobile Interface > Disable
Web Application Firewall Rules
allConfigure WAF to block malicious XSS payloads in the Id parameter
Add WAF rule: Block requests to /Mobile/ContactDetails.aspx with suspicious characters in Id parameter (e.g., <, >, script, javascript)
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to prevent script execution from untrusted sources
- Enable HttpOnly flag on all session cookies to prevent cookie theft via XSS
🔍 How to Verify
Check if Vulnerable:
Access /Mobile/ContactDetails.aspx?id=test'><script>alert('XSS')</script> and check if script executes in browserCheck Version:
Check MailEnable Management Console > Help > About or review installation directory version filesVerify Fix Applied:
After patching, test the same payload - script should not execute and input should be properly sanitized📡 Detection & Monitoring
Log Indicators:
- HTTP GET requests to /Mobile/ContactDetails.aspx with suspicious Id parameter values containing script tags or JavaScript code
- Multiple failed login attempts following suspicious mobile interface access
Network Indicators:
- Unusual traffic patterns to /Mobile/ContactDetails.aspx endpoint
- Requests with encoded XSS payloads in URL parameters
SIEM Query:
source="mailenable.log" AND uri="/Mobile/ContactDetails.aspx" AND (id="*<script>*" OR id="*javascript:*" OR id="*alert(*")