CVE-2025-3750
📋 TL;DR
The Network Posts Extended WordPress plugin has a stored XSS vulnerability in the 'post_height' parameter that allows authenticated attackers with Contributor access or higher to inject malicious scripts. These scripts execute when users view compromised pages, potentially affecting all visitors to vulnerable WordPress sites.
💻 Affected Systems
- Network Posts Extended WordPress 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 steal session cookies, redirect users to malicious sites, deface websites, or perform actions on behalf of authenticated users, potentially leading to full site compromise.
Likely Case
Attackers with contributor access inject malicious scripts that steal user session cookies or redirect visitors to phishing sites, compromising user accounts and site integrity.
If Mitigated
With proper input validation and output escaping, the vulnerability is prevented, and even if exploited, web application firewalls and content security policies limit script execution.
🎯 Exploit Status
Exploitation requires authenticated access with at least Contributor privileges. The vulnerability is in a widely used WordPress plugin, making it an attractive target.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.7.2 or later
Vendor Advisory: https://wordpress.org/plugins/network-posts-extended/#developers
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Network Posts Extended' and check if update is available. 4. Click 'Update Now' to install version 7.7.2 or later. 5. Verify the plugin is updated to a patched version.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate network-posts-extended
Restrict User Roles
linuxTemporarily remove Contributor and higher roles from untrusted users
wp user list --role=contributor --field=ID | xargs wp user set-role subscriber
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with XSS protection rules
- Add Content Security Policy headers to restrict script execution sources
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Network Posts Extended → Version. If version is 7.7.1 or earlier, you are vulnerable.Check Version:
wp plugin get network-posts-extended --field=versionVerify Fix Applied:
After updating, verify the plugin version shows 7.7.2 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php with post_height parameter containing script tags
- Multiple failed authentication attempts followed by successful contributor-level login
Network Indicators:
- HTTP requests containing malicious script payloads in post_height parameter
- Outbound connections to suspicious domains from your WordPress site
SIEM Query:
source="wordpress.log" AND ("post_height" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload="))