CVE-2023-6271
📋 TL;DR
The Backup Migration WordPress plugin before version 1.3.6 stores in-progress backup information in publicly accessible files, allowing unauthenticated attackers to monitor and leak sensitive data from site backups. This affects all WordPress sites using vulnerable versions of the plugin.
💻 Affected Systems
- Backup Migration WordPress plugin
📦 What is this software?
Backup Migration by Backupbliss
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full control of the WordPress site by extracting sensitive backup data including database credentials, admin sessions, and configuration files.
Likely Case
Unauthenticated attackers exfiltrate sensitive backup data containing database content, user information, and site configuration.
If Mitigated
Limited information disclosure if backups contain minimal sensitive data and proper access controls are implemented.
🎯 Exploit Status
Proof-of-concept exploit code is publicly available and requires no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.6
Vendor Advisory: https://wordpress.org/plugins/backup-backup/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Backup Migration plugin. 4. Click 'Update Now' if available, or manually update to version 1.3.6 or later.
🔧 Temporary Workarounds
Disable plugin temporarily
allDeactivate the Backup Migration plugin until patched
wp plugin deactivate backup-backup
Block access to backup files
linuxAdd .htaccess rules to block public access to backup directories
Add to .htaccess: Order Deny,Allow
Deny from all
🧯 If You Can't Patch
- Disable the Backup Migration plugin immediately
- Implement web application firewall rules to block access to backup file paths
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Backup Migration version numberCheck Version:
wp plugin get backup-backup --field=versionVerify Fix Applied:
Verify plugin version is 1.3.6 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to backup file paths
- Multiple failed attempts to access backup directories
Network Indicators:
- HTTP requests to backup-related file paths from external IPs
SIEM Query:
source="web_logs" AND (uri_path="/wp-content/backup*" OR uri_path="/wp-content/uploads/backup*")🔗 References
- https://research.cleantalk.org/cve-2023-6271-backup-migration-unauth-sensitive-data-exposure-to-full-control-of-the-site-poc-exploit
- https://wpscan.com/vulnerability/7ac217db-f332-404b-a265-6dc86fe747b9
- https://research.cleantalk.org/cve-2023-6271-backup-migration-unauth-sensitive-data-exposure-to-full-control-of-the-site-poc-exploit
- https://wpscan.com/vulnerability/7ac217db-f332-404b-a265-6dc86fe747b9
