CVE-2024-53804
📋 TL;DR
This vulnerability in WP Mailster WordPress plugin exposes sensitive data embedded in sent emails or communications. Attackers can retrieve confidential information that should remain hidden. All WordPress sites using WP Mailster versions up to 1.8.16.0 are affected.
💻 Affected Systems
- WP Mailster WordPress Plugin
📦 What is this software?
Wp Mailster by Wpmailster
⚠️ Risk & Real-World Impact
Worst Case
Complete exposure of all sensitive data embedded in emails, potentially including passwords, API keys, personal information, or internal communications.
Likely Case
Exposure of user data, configuration details, or other sensitive information that attackers can use for further exploitation or data theft.
If Mitigated
Limited data exposure with proper access controls and monitoring in place, allowing for quick detection and response.
🎯 Exploit Status
The vulnerability involves retrieving embedded sensitive data from sent communications, which typically requires minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 1.8.16.0
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find WP Mailster and check for updates. 4. Update to the latest version (above 1.8.16.0). 5. Verify the update completed successfully.
🔧 Temporary Workarounds
Disable WP Mailster Plugin
allTemporarily disable the vulnerable plugin until patching is possible
wp plugin deactivate wp-mailster
🧯 If You Can't Patch
- Implement network segmentation to isolate WordPress installation
- Enable detailed logging and monitoring for suspicious data access patterns
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins → WP Mailster versionCheck Version:
wp plugin get wp-mailster --field=versionVerify Fix Applied:
Confirm WP Mailster version is above 1.8.16.0 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual data retrieval patterns from WP Mailster endpoints
- Multiple requests to email-related endpoints from suspicious IPs
Network Indicators:
- Abnormal traffic to /wp-content/plugins/wp-mailster/ endpoints
- Data exfiltration patterns from WordPress installation
SIEM Query:
source="wordpress" AND (plugin="wp-mailster" OR uri="/wp-content/plugins/wp-mailster/") AND (status=200 OR method="GET") | stats count by src_ip