CVE-2022-1556
📋 TL;DR
This vulnerability allows attackers to execute arbitrary SQL commands on WordPress sites using the StaffList plugin before version 3.1.5. The SQL injection occurs when searching for staff members in the admin dashboard, potentially allowing attackers to read, modify, or delete database contents. Any WordPress site with the vulnerable plugin version is affected.
💻 Affected Systems
- WordPress StaffList Plugin
📦 What is this software?
Stafflist by Era404
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, privilege escalation, site takeover, or remote code execution via database functions.
Likely Case
Unauthorized data access, credential theft from database, and potential site defacement.
If Mitigated
Limited impact with proper input validation, database user restrictions, and web application firewall rules.
🎯 Exploit Status
Exploitation requires admin dashboard access. Public proof-of-concept code is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.1.5
Vendor Advisory: https://wpscan.com/vulnerability/04890549-6bd1-44dd-8bce-7125c01be5d4
Restart Required: No
Instructions:
1. Log into WordPress admin dashboard. 2. Navigate to Plugins > Installed Plugins. 3. Find StaffList plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 3.1.5+ from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable StaffList Plugin
allTemporarily disable the vulnerable plugin until patching is possible.
wp plugin deactivate stafflist
Web Application Firewall Rule
allBlock SQL injection patterns targeting the vulnerable endpoint.
ModSecurity rule: SecRule ARGS "(?i:(union|select|insert|update|delete|drop|alter).*)" "id:1001,phase:2,deny"
🧯 If You Can't Patch
- Restrict admin dashboard access to trusted IP addresses only
- Implement database user with minimal privileges (read-only if possible)
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin dashboard > Plugins > StaffList version. If version is below 3.1.5, system is vulnerable.Check Version:
wp plugin get stafflist --field=versionVerify Fix Applied:
Confirm StaffList plugin version is 3.1.5 or higher in WordPress admin dashboard.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts to admin dashboard
- Unexpected database schema changes
Network Indicators:
- HTTP POST requests to /wp-admin/admin-ajax.php with SQL keywords in parameters
- Unusual database connection patterns from web server
SIEM Query:
source="web_server" AND (url="*admin-ajax.php*" AND (param="*union*" OR param="*select*" OR param="*insert*"))