CVE-2021-25003
📋 TL;DR
This vulnerability in the WPCargo Track & Trace WordPress plugin allows unauthenticated attackers to write arbitrary PHP files anywhere on the web server, leading to remote code execution. It affects WordPress sites running WPCargo Track & Trace plugin versions before 6.9.0. Attackers can exploit this without any authentication to take full control of vulnerable websites.
💻 Affected Systems
- WPCargo Track & Trace WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise allowing attackers to execute arbitrary code, steal data, install backdoors, deface websites, or pivot to internal networks.
Likely Case
Website takeover with malware installation, data theft, and potential use as part of botnets or for further attacks.
If Mitigated
Limited impact if proper web application firewalls and file permission controls prevent exploitation attempts.
🎯 Exploit Status
Exploitation is straightforward with publicly available proof-of-concept code. No authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.9.0 and later
Vendor Advisory: https://wpscan.com/vulnerability/5c21ad35-b2fb-4a51-858f-8ffff685de4a
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find WPCargo Track & Trace plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete plugin, then install fresh version 6.9.0+ from WordPress repository.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the WPCargo Track & Trace plugin until patched
wp plugin deactivate wp-cargo-track-trace
Restrict file upload directory permissions
linuxSet strict permissions on WordPress upload directories
chmod 755 wp-content/uploads
chmod 644 wp-content/uploads/*
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block requests to vulnerable plugin endpoints
- Remove write permissions from web server user on critical directories using chmod 555
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → WPCargo Track & Trace version. If version is below 6.9.0, system is vulnerable.Check Version:
wp plugin get wp-cargo-track-trace --field=versionVerify Fix Applied:
Verify plugin version is 6.9.0 or higher in WordPress admin panel. Test that the vulnerable endpoint no longer accepts file writes.📡 Detection & Monitoring
Log Indicators:
- POST requests to /wp-content/plugins/wp-cargo-track-trace/ files with PHP content
- Unauthenticated file write attempts in web server logs
- Unexpected PHP file creation in upload directories
Network Indicators:
- HTTP requests to plugin-specific endpoints from unauthenticated sources
- Unusual outbound connections from web server after exploitation
SIEM Query:
source="web_server_logs" AND (uri="/wp-content/plugins/wp-cargo-track-trace/*" AND method="POST") AND status=200