CVE-2025-25054
📋 TL;DR
Movable Type contains a reflected cross-site scripting vulnerability in the user information edit page when the Multi-Factor authentication plugin is enabled. An attacker can craft a malicious page that, when accessed by a logged-in user, executes arbitrary JavaScript in the victim's browser. This affects Movable Type installations with the MFA plugin enabled.
💻 Affected Systems
- Movable Type
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
An attacker could steal session cookies, perform actions as the victim user, or redirect to malicious sites, potentially leading to account takeover or data theft.
Likely Case
Session hijacking or credential theft through cookie/session token exfiltration, allowing unauthorized access to the Movable Type admin interface.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, or if users don't access crafted malicious links.
🎯 Exploit Status
Exploitation requires user interaction (clicking a crafted link) and the MFA plugin to be enabled.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.4.2
Vendor Advisory: https://www.movabletype.org/news/2025/02/mt-842-released.html
Restart Required: Yes
Instructions:
1. Backup your Movable Type installation and database. 2. Download Movable Type 8.4.2 from the official website. 3. Replace existing files with the new version. 4. Restart the web server. 5. Verify the update by checking the version in the admin interface.
🔧 Temporary Workarounds
Disable MFA Plugin
allTemporarily disable the Multi-Factor authentication plugin to mitigate the vulnerability.
Navigate to Movable Type admin panel > Plugins > Disable Multi-Factor Authentication plugin
Implement WAF Rules
allConfigure web application firewall to block XSS payloads in user information edit page requests.
Add WAF rule to filter script tags and JavaScript events in URL parameters
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution sources.
- Educate users not to click suspicious links and implement URL filtering.
🔍 How to Verify
Check if Vulnerable:
Check if Movable Type version is below 8.4.2 and MFA plugin is enabled in the admin interface.Check Version:
Check Movable Type admin dashboard > System Information > VersionVerify Fix Applied:
Verify version is 8.4.2 or higher in the admin dashboard and test user edit page for XSS payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests to user edit page with script tags or JavaScript in parameters
- Multiple failed login attempts followed by user edit page access
Network Indicators:
- HTTP requests containing <script> tags or JavaScript events in URL parameters to user edit endpoints
SIEM Query:
source="web_server_logs" AND (uri_path="/cgi-bin/mt/mt-user.cgi" OR uri_path LIKE "%/mt-user.cgi") AND (query_string LIKE "%<script>%" OR query_string LIKE "%javascript:%" OR query_string LIKE "%onerror=%")