CVE-2025-11270
📋 TL;DR
This stored XSS vulnerability in the Gutenberg Essential Blocks WordPress plugin allows authenticated attackers with Contributor access or higher to inject malicious scripts into website pages. The scripts execute automatically when users visit compromised pages, potentially stealing credentials or performing unauthorized actions. All WordPress sites using this plugin up to version 5.7.1 are affected.
💻 Affected Systems
- Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
⚠️ 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 administrator credentials, deface websites, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Attackers with contributor accounts inject malicious scripts to steal user session cookies or credentials, potentially escalating privileges.
If Mitigated
With proper user access controls and content security policies, impact is limited to isolated script execution without data exfiltration.
🎯 Exploit Status
Requires authenticated access (Contributor role minimum) and knowledge of WordPress plugin structure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 5.7.2 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3376903/essential-blocks/trunk/views/woocommerce/title.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Gutenberg Essential Blocks'. 4. Click 'Update Now' if available. 5. If no update shows, manually download version 5.7.2+ from WordPress.org and replace plugin files.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily deactivate the Gutenberg Essential Blocks plugin until patched.
wp plugin deactivate essential-blocks
Restrict user roles
allTemporarily remove Contributor role access or limit to trusted users only.
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Regularly audit user accounts and remove unnecessary Contributor+ roles
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins → Gutenberg Essential Blocks version number.Check Version:
wp plugin get essential-blocks --field=versionVerify Fix Applied:
Confirm plugin version is 5.7.2 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php with titleTag parameters
- Multiple page edits from Contributor accounts
Network Indicators:
- External script loads from unexpected domains in page responses
SIEM Query:
source="wordpress.log" AND "titleTag" AND ("POST" OR "admin-ajax")