CVE-2025-23463
📋 TL;DR
This vulnerability in the WordPress MD Custom Content plugin allows attackers to perform Cross-Site Request Forgery (CSRF) attacks that lead to Stored Cross-Site Scripting (XSS). Attackers can trick authenticated administrators into executing malicious actions that inject persistent scripts into website content. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WordPress MD Custom Content After or Before of Post 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
Complete site takeover through persistent XSS payloads that steal admin credentials, deface websites, or redirect visitors to malicious sites.
Likely Case
Website defacement, cookie theft from visitors, or injection of malicious scripts that affect site users.
If Mitigated
Limited impact with proper CSRF tokens and content sanitization in place.
🎯 Exploit Status
Exploitation requires social engineering to trick authenticated admin into clicking malicious link while logged in.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.0 (check plugin repository for latest)
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'MD Custom Content After or Before of Post'. 4. Click 'Update Now' if available, or delete and install latest version from repository.
🔧 Temporary Workarounds
Disable vulnerable plugin
WordPressTemporarily disable the plugin until patched version is available
wp plugin deactivate md-custom-content
Implement CSRF protection
WordPressAdd nonce verification to plugin forms and AJAX requests
Add wp_nonce_field() to forms and check_admin_referer() to processing
🧯 If You Can't Patch
- Remove plugin entirely and use alternative content management solutions
- Implement web application firewall (WAF) rules to block XSS payloads and suspicious POST requests
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Installed Plugins for 'MD Custom Content After or Before of Post' version 1.0 or earlierCheck Version:
wp plugin get md-custom-content --field=versionVerify Fix Applied:
Verify plugin version is greater than 1.0 or plugin is removed/disabled📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to wp-admin/admin-ajax.php with plugin-specific actions
- Multiple failed nonce verification attempts
Network Indicators:
- Suspicious JavaScript payloads in POST parameters
- Requests from unexpected referrers to admin endpoints
SIEM Query:
source="wordpress.log" AND ("md-custom-content" OR "admin-ajax.php") AND (POST AND NOT "_wpnonce")