CVE-2025-34397
📋 TL;DR
MailEnable versions before 10.54 contain a reflected XSS vulnerability in the Message parameter of /Mobile/Compose.aspx. Attackers can craft malicious URLs that execute JavaScript in victims' browsers when opened, potentially stealing cookies or performing actions as authenticated users. This affects all MailEnable installations using vulnerable versions with the Mobile interface accessible.
💻 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 victim user including reading/sending emails.
Likely Case
Attackers steal non-HttpOnly session cookies to hijack authenticated sessions, potentially accessing email accounts and sensitive communications.
If Mitigated
With HttpOnly cookies and proper session management, impact reduces to UI manipulation and potential phishing via page content injection.
🎯 Exploit Status
Exploitation requires victim to click crafted link. No authentication needed to trigger 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 official site. 2. Backup current configuration. 3. Run installer to upgrade. 4. Restart MailEnable services.
🔧 Temporary Workarounds
Disable Mobile Interface
windowsRemove or restrict access to /Mobile/ directory to prevent exploitation.
Remove or rename C:\Program Files\Mail Enable\Web\Mobile directory
Web Application Firewall Rules
allImplement WAF rules to block XSS payloads in Message parameter.
Add WAF rule: Block requests with suspicious JavaScript patterns in Message parameter
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to block inline JavaScript execution
- Configure IIS/webserver to require POST requests for /Mobile/Compose.aspx endpoint
🔍 How to Verify
Check if Vulnerable:
Test by accessing /Mobile/Compose.aspx?Message=<script>alert('XSS')</script> and checking if script executes.Check Version:
Check MailEnable version in Control Panel or via registry: HKEY_LOCAL_MACHINE\SOFTWARE\MailEnableVerify Fix Applied:
After patching, test same payload - script should not execute and input should be properly sanitized.📡 Detection & Monitoring
Log Indicators:
- HTTP GET requests to /Mobile/Compose.aspx with Message parameter containing script tags or JavaScript keywords
Network Indicators:
- Unusual outbound connections from MailEnable server after XSS payload delivery
SIEM Query:
source="mailenable.log" AND uri="/Mobile/Compose.aspx" AND (Message="*script*" OR Message="*javascript:*" OR Message="*onload*" OR Message="*onerror*")