CVE-2016-15040
📋 TL;DR
This SQL injection vulnerability in the Kento Post View Counter WordPress plugin allows unauthenticated attackers to execute arbitrary SQL queries through the 'kento_pvc_geo' parameter. Attackers can extract sensitive information from the database, including user credentials and other confidential data. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WordPress Kento Post View Counter plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to credential theft, data exfiltration, privilege escalation, and potential site takeover.
Likely Case
Extraction of sensitive data including user credentials, personal information, and potentially gaining administrative access.
If Mitigated
Limited impact with proper input validation and parameterized queries in place.
🎯 Exploit Status
SQL injection via GET parameter requires minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 2.9 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/1491539/kento-post-view-counter/trunk/index.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find 'Kento Post View Counter'
4. Click 'Update Now' if available
5. If no update available, deactivate and delete the plugin
6. Install the latest version from WordPress repository
🔧 Temporary Workarounds
Temporary Parameter Blocking
allBlock requests containing the vulnerable parameter at web server level
# For Apache .htaccess:
RewriteEngine On
RewriteCond %{QUERY_STRING} kento_pvc_geo [NC]
RewriteRule .* - [F,L]
# For Nginx:
location / {
if ($args ~* "kento_pvc_geo") {
return 403;
}
}
🧯 If You Can't Patch
- Deactivate and remove the Kento Post View Counter plugin immediately
- Implement web application firewall (WAF) rules to block SQL injection patterns
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Kento Post View Counter version. If version is 2.8 or lower, you are vulnerable.Check Version:
wp plugin list --name='kento-post-view-counter' --field=versionVerify Fix Applied:
Verify plugin version is 2.9 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in WordPress logs
- Multiple requests with 'kento_pvc_geo' parameter containing SQL syntax
- Requests from single IPs with varying SQL payloads
Network Indicators:
- HTTP GET requests containing SQL keywords in kento_pvc_geo parameter
- Unusual database query patterns from web server
SIEM Query:
source="wordpress.log" AND "kento_pvc_geo" AND ("SELECT" OR "UNION" OR "INSERT" OR "UPDATE" OR "DELETE")