CVE-2019-25224
📋 TL;DR
This vulnerability allows unauthenticated attackers to execute arbitrary operating system commands on WordPress sites running vulnerable versions of the WP Database Backup plugin. Attackers can achieve full system compromise by injecting malicious commands through the mysqldump function. All WordPress sites using WP Database Backup versions before 5.2 are affected.
💻 Affected Systems
- WP Database Backup WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with attacker gaining root/admin privileges, installing persistent backdoors, stealing sensitive data, and using the compromised server as a pivot point for attacking other systems.
Likely Case
Webshell deployment leading to data exfiltration, cryptocurrency mining, or participation in botnets. Attackers typically install backdoors for persistent access.
If Mitigated
Limited impact due to proper network segmentation, minimal privileges, and intrusion detection systems catching exploitation attempts early.
🎯 Exploit Status
Metasploit module available. Exploitation requires minimal technical skill. Attackers can chain commands through the mysqldump parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.2 and later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/2078035/wp-database-backup
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find WP Database Backup. 4. Click 'Update Now' if available. 5. If no update available, deactivate and delete plugin, then install fresh version 5.2+ from WordPress repository.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patching is possible
wp plugin deactivate wp-database-backup
Web Application Firewall Rule
allBlock malicious requests targeting the vulnerable endpoint
# WAF rule to block requests containing command injection patterns in mysqldump parameter
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the vulnerable system from critical assets
- Deploy host-based intrusion detection system (HIDS) to monitor for command execution attempts and unusual process activity
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins. Look for WP Database Backup version number. If version is below 5.2, system is vulnerable.Check Version:
wp plugin get wp-database-backup --field=versionVerify Fix Applied:
Verify plugin version is 5.2 or higher in WordPress admin panel. Test backup functionality to ensure plugin still works properly.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /wp-admin/admin-ajax.php with mysqldump parameter containing shell metacharacters (;, |, &, $)
- Sudden appearance of unfamiliar processes or files in web directory
- Outbound connections to suspicious IPs from web server process
Network Indicators:
- HTTP requests with command injection payloads in URL parameters
- Unusual outbound traffic patterns from web server
SIEM Query:
source="web_logs" AND uri_path="/wp-admin/admin-ajax.php" AND (param="mysqldump" AND value MATCHES "[;&|$`]+")🔗 References
- https://blog.sucuri.net/2019/06/os-command-injection-in-wp-database-backup.html
- https://packetstormsecurity.com/files/153781/
- https://plugins.trac.wordpress.org/changeset/2078035/wp-database-backup
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/wp_db_backup_rce.rb
- https://www.wordfence.com/blog/2019/05/os-command-injection-vulnerability-patched-in-wp-database-backup-plugin/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/d21cf285-9d75-43a2-9e81-67116f0bf896?source=cve
