CVE-2025-55706
📋 TL;DR
This CVE describes an open redirect vulnerability in Movable Type's password reset functionality. Attackers can manipulate parameters to redirect users to malicious websites after password reset attempts. All Movable Type installations using vulnerable versions are affected.
💻 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
Users could be redirected to phishing sites that steal credentials or deliver malware, potentially leading to account compromise or system infection.
Likely Case
Attackers use the redirect for phishing campaigns, tricking users into entering credentials on fake login pages.
If Mitigated
Users might briefly see unexpected redirects but modern browsers may warn about suspicious URLs.
🎯 Exploit Status
Exploitation requires user interaction (clicking password reset link) and knowledge of vulnerable parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.4.3
Vendor Advisory: https://movabletype.org/news/2025/08/mt-843-released.html
Restart Required: No
Instructions:
1. Backup your Movable Type installation and database. 2. Download Movable Type 8.4.3 from the official website. 3. Replace all files with the new version. 4. Run the upgrade script if prompted.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to reject or sanitize redirect URLs in password reset functionality
🧯 If You Can't Patch
- Implement WAF rules to block requests containing suspicious redirect parameters
- Monitor logs for unusual redirect patterns and educate users about phishing risks
🔍 How to Verify
Check if Vulnerable:
Check Movable Type version in admin panel or via mt-config.cgi fileCheck Version:
Check MT_VERSION in mt-config.cgi or admin panelVerify Fix Applied:
Verify version is 8.4.3 or later and test password reset functionality with malicious redirect parameters📡 Detection & Monitoring
Log Indicators:
- Unusual redirect URLs in password reset logs
- Multiple failed password reset attempts with similar patterns
Network Indicators:
- HTTP 302 redirects to external domains after password reset requests
SIEM Query:
http.status_code=302 AND url.path contains "password_reset" AND url.query contains "redirect"