CVE-2025-39438
📋 TL;DR
A Cross-Site Request Forgery (CSRF) vulnerability in the momen2009 Theme Changer WordPress plugin allows attackers to trick authenticated administrators into performing unintended actions. This affects WordPress sites using Theme Changer plugin versions up to 1.3. Attackers could change site themes or potentially perform other administrative actions.
💻 Affected Systems
- WordPress momen2009 Theme Changer plugin
⚠️ 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
Attackers could change site themes to malicious versions containing backdoors, redirect users to phishing sites, or deface the website by switching to inappropriate themes.
Likely Case
Attackers would change the site theme to disrupt operations or inject malicious content, requiring administrator interaction to exploit.
If Mitigated
With proper CSRF protections, no unauthorized theme changes would occur even if administrators visit malicious pages.
🎯 Exploit Status
Exploitation requires tricking an authenticated administrator to click a malicious link while logged in.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.4 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find 'Theme Changer' plugin
4. Click 'Update Now' if available
5. If no update available, deactivate and delete the plugin
6. Install updated version from WordPress repository
🔧 Temporary Workarounds
Add CSRF Protection Manually
allAdd nonce verification to theme changer functionality
Edit plugin files to add wp_nonce_field() and wp_verify_nonce() checks
Restrict Admin Access
allLimit administrator access to trusted networks only
🧯 If You Can't Patch
- Deactivate and remove the Theme Changer plugin immediately
- Implement web application firewall rules to block CSRF attempts
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for 'Theme Changer' version 1.3 or earlierCheck Version:
wp plugin list --name='theme-changer' --field=versionVerify Fix Applied:
Verify plugin version is 1.4 or later, or confirm plugin is removed📡 Detection & Monitoring
Log Indicators:
- Unexpected theme changes in WordPress logs
- Admin actions from unusual IP addresses
Network Indicators:
- POST requests to theme changer endpoints without proper referrer headers
SIEM Query:
source="wordpress.log" AND "theme" AND "changed" AND user="admin"