CVE-2020-35950
📋 TL;DR
This vulnerability in the XCloner Backup and Restore WordPress plugin allows Cross-Site Request Forgery (CSRF) attacks via almost any endpoint. Attackers can trick authenticated administrators into performing unintended actions like modifying settings, deleting backups, or potentially compromising the WordPress site. All WordPress sites using vulnerable versions of the XCloner plugin are affected.
💻 Affected Systems
- XCloner Backup and Restore WordPress Plugin
📦 What is this software?
Xcloner by Xcloner
⚠️ Risk & Real-World Impact
Worst Case
Complete site takeover through CSRF attacks that trick administrators into executing malicious actions, potentially leading to data loss, backup deletion, or installation of backdoors.
Likely Case
Unauthorized configuration changes, backup deletion, or data manipulation by tricking authenticated users into clicking malicious links.
If Mitigated
Limited impact with proper CSRF protections, user awareness training, and network segmentation in place.
🎯 Exploit Status
CSRF attacks require tricking authenticated users but are relatively simple to execute. Public exploit details are available through security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.2.153 and later
Vendor Advisory: https://wordpress.org/plugins/xcloner-backup-and-restore/#developers
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find XCloner Backup and Restore. 4. Click 'Update Now' if available. 5. Alternatively, download version 4.2.153+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable XCloner Plugin
allTemporarily disable the vulnerable plugin until patching is possible
wp plugin deactivate xcloner-backup-and-restore
Implement CSRF Protection Headers
linuxAdd security headers to WordPress to help mitigate CSRF attacks
Add to .htaccess: Header set X-Frame-Options DENY
Add to .htaccess: Header set Content-Security-Policy "frame-ancestors 'none'"
🧯 If You Can't Patch
- Implement strict access controls and limit administrative access to trusted networks only
- Deploy web application firewall (WAF) rules to detect and block CSRF attack patterns
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → XCloner Backup and Restore → Version. If version is below 4.2.153, the site is vulnerable.Check Version:
wp plugin get xcloner-backup-and-restore --field=versionVerify Fix Applied:
Confirm XCloner plugin version is 4.2.153 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to XCloner endpoints without proper referrer headers
- Multiple failed CSRF token validations in WordPress logs
- Unexpected configuration changes to XCloner settings
Network Indicators:
- HTTP requests to /wp-admin/admin.php?page=xcloner_ with suspicious referrers
- CSRF attack patterns in web server logs
SIEM Query:
source="wordpress.log" AND ("xcloner" OR "admin-ajax.php") AND ("csrf" OR "referer" NOT CONTAINS "your-domain.com")