CVE-2023-47828
📋 TL;DR
CVE-2023-47828 is a missing authorization vulnerability in the wpMandrill WordPress plugin that allows unauthorized users to access certain administrative functions. This affects all WordPress sites using wpMandrill versions up to 1.33. Attackers could potentially modify plugin settings or access restricted functionality.
💻 Affected Systems
- wpMandrill WordPress Plugin
📦 What is this software?
Mandrill by Millermedia
⚠️ Risk & Real-World Impact
Worst Case
Unauthorized attackers could modify email sending configurations, potentially enabling email spoofing, intercepting emails, or disrupting email communications from the WordPress site.
Likely Case
Attackers could change plugin settings to redirect emails, modify email templates, or disrupt email functionality, potentially enabling phishing campaigns or business email compromise.
If Mitigated
With proper network segmentation and access controls, impact would be limited to the specific WordPress instance, preventing lateral movement to other systems.
🎯 Exploit Status
Exploitation requires some level of access to the WordPress site, but not necessarily administrative privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.34 or later
Vendor Advisory: https://patchstack.com/database/vulnerability/wpmandrill/wordpress-wpmandrill-plugin-1-33-broken-access-control-vulnerability
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find wpMandrill and click 'Update Now'. 4. Verify update to version 1.34 or later.
🔧 Temporary Workarounds
Disable wpMandrill Plugin
allTemporarily disable the vulnerable plugin until patching is possible
wp plugin deactivate wpmandrill
Restrict Access via .htaccess
linuxAdd access restrictions to wpMandrill plugin directory
Order deny,allow
Deny from all
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access the WordPress admin interface
- Enable WordPress security plugins that monitor for unauthorized access attempts and block suspicious IPs
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins → wpMandrill versionCheck Version:
wp plugin get wpmandrill --field=versionVerify Fix Applied:
Verify wpMandrill version is 1.34 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to wpMandrill admin endpoints
- Changes to wpMandrill settings from non-admin users
Network Indicators:
- Unusual POST requests to /wp-admin/admin-ajax.php with wpMandrill actions
SIEM Query:
source="wordpress.log" AND (uri="/wp-admin/admin-ajax.php" AND action="wpmandrill_*")