CVE-2025-39435
📋 TL;DR
This CVE describes a Cross-Site Request Forgery (CSRF) vulnerability in the WordPress My Marginalia plugin that leads to Stored Cross-Site Scripting (XSS). Attackers can trick authenticated administrators into executing malicious actions, which then inject persistent scripts into the website. This affects all WordPress sites using My Marginalia plugin versions up to and including 1.0.6.
💻 Affected Systems
- WordPress My Marginalia 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
An attacker could compromise administrator accounts, inject malicious JavaScript that steals session cookies or credentials, deface websites, or redirect users to malicious sites.
Likely Case
Attackers would typically inject malicious scripts to steal administrator cookies or session tokens, potentially gaining full control of the WordPress site.
If Mitigated
With proper CSRF protections and content security policies, the attack would fail or have limited impact.
🎯 Exploit Status
Exploitation requires social engineering to trick an authenticated administrator, but the technical execution is straightforward once the victim visits a malicious page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.7 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find My Marginalia and click 'Update Now' if available. 4. If no update appears, manually download version 1.0.7+ from WordPress.org and replace the plugin files via FTP/SFTP.
🔧 Temporary Workarounds
Disable My Marginalia Plugin
allTemporarily deactivate the vulnerable plugin until patched.
wp plugin deactivate my-marginalia
Implement CSRF Tokens Manually
allAdd CSRF protection to plugin forms if you have development expertise.
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with CSRF and XSS protection rules.
- Educate administrators about phishing risks and implement strict browsing policies for admin accounts.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > My Marginalia. If version is 1.0.6 or earlier, you are vulnerable.Check Version:
wp plugin get my-marginalia --field=versionVerify Fix Applied:
After updating, verify the plugin version shows 1.0.7 or higher in WordPress admin.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to My Marginalia admin endpoints without referrer headers
- Administrator account performing unexpected plugin configuration changes
Network Indicators:
- Outbound connections to suspicious domains following administrator actions on the plugin
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-admin/admin-ajax.php" OR uri_path CONTAINS "my-marginalia") AND http_method="POST" AND referrer=""