CVE-2024-44051
📋 TL;DR
This stored XSS vulnerability in the WordPress Content Blocks (Custom Post Widget) plugin allows attackers to inject malicious scripts into web pages. When users view affected pages, the scripts execute in their browsers, potentially stealing credentials or performing unauthorized actions. All WordPress sites using vulnerable plugin versions are affected.
💻 Affected Systems
- WordPress Content Blocks (Custom Post Widget) plugin
📦 What is this software?
Content Blocks by Vanderwijk
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, take over the WordPress site, deface content, or redirect visitors to malicious sites.
Likely Case
Attackers inject malicious scripts to steal user session cookies or credentials, potentially compromising user accounts.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before execution.
🎯 Exploit Status
Exploitation requires contributor-level access or higher to inject malicious content.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.3.6 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Content Blocks (Custom Post Widget)'. 4. Click 'Update Now' if available, or download version 3.3.6+ from WordPress repository. 5. Activate the updated plugin.
🔧 Temporary Workarounds
Disable plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate custom-post-widget
Restrict user roles
allLimit content creation to trusted administrators only
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Enable Content Security Policy (CSP) headers to restrict script execution
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for 'Content Blocks (Custom Post Widget)' versionCheck Version:
wp plugin get custom-post-widget --field=versionVerify Fix Applied:
Verify plugin version is 3.3.6 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to wp-admin with script tags
- Multiple content updates from single user in short time
Network Indicators:
- Outbound connections to suspicious domains after page load
- Unexpected script sources in page responses
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/*" AND (http_method="POST" AND (content="<script>" OR content="javascript:")))