CVE-2025-34407
📋 TL;DR
MailEnable versions before 10.54 contain a reflected cross-site scripting vulnerability in the theme parameter of Statistics.aspx. Attackers can craft malicious links that execute JavaScript in victims' browsers when clicked, potentially stealing cookies or performing actions as authenticated users. This affects all MailEnable installations using vulnerable versions.
💻 Affected Systems
- MailEnable
📦 What is this software?
Mailenable by Mailenable
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal authentication cookies, hijack user sessions, redirect to malicious sites, and perform administrative actions as authenticated users.
Likely Case
Attackers steal non-HttpOnly session cookies and hijack user sessions, potentially accessing email accounts or administrative functions.
If Mitigated
With HttpOnly cookies and proper input validation, impact reduces to limited HTML/CSS injection or temporary page defacement.
🎯 Exploit Status
Exploitation requires user interaction via malicious link. Payload examples available in public advisories.
🛠️ 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 website. 2. Run installer to upgrade existing installation. 3. Restart MailEnable services. 4. Verify version in administration interface.
🔧 Temporary Workarounds
Input Validation Filter
allImplement web application firewall or input validation to sanitize theme parameter
Disable Statistics Page
windowsRemove or restrict access to /Mondo/lang/sys/Forms/Statistics.aspx
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to prevent script execution
- Configure web application firewall to block XSS payloads in theme parameter
🔍 How to Verify
Check if Vulnerable:
Access /Mondo/lang/sys/Forms/Statistics.aspx?theme=<script>alert('test')</script> and check if script executesCheck Version:
Check MailEnable version in administration interface or program files propertiesVerify 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 Statistics.aspx with script tags or JavaScript in theme parameter
- Unusual length or character patterns in theme parameter values
Network Indicators:
- HTTP requests containing <script>, javascript:, or other XSS payloads in URL parameters
SIEM Query:
source="web_logs" AND url="*Statistics.aspx*" AND (url="*<script>*" OR url="*javascript:*")