CVE-2023-50856 – This SQL injection vulnerability in FunnelKit's... (How to Fix)

Q: What is the severity of CVE-2023-50856?

CVE-2023-50856 has a CVSS score of 7.6 (HIGH). This SQL injection vulnerability in FunnelKit's Funnel Builder WordPress plugin allows attackers to execute arbitrary SQL commands on affected WordPress databases. It affects all versions up to 2.14.3 of the plugin, potentially compromising any WordPress site using this plugin for WooCommerce funnel building.

📋 TL;DR

This SQL injection vulnerability in FunnelKit's Funnel Builder WordPress plugin allows attackers to execute arbitrary SQL commands on affected WordPress databases. It affects all versions up to 2.14.3 of the plugin, potentially compromising any WordPress site using this plugin for WooCommerce funnel building.

💻 Affected Systems

Products:

Funnel Builder for WordPress by FunnelKit

Versions: All versions up to and including 2.14.3

Operating Systems: Any OS running WordPress

Default Config Vulnerable: ⚠️ Yes

Notes: Requires WordPress with WooCommerce and the Funnel Builder plugin installed and activated.

📦 What is this software?

Funnel Builder by Funnelkit

View all CVEs affecting Funnel Builder →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete database compromise leading to data theft, privilege escalation, site defacement, or full system takeover if database permissions allow file system access.

🟠

Likely Case

Unauthorized data access including sensitive customer information, order details, and potentially administrative credentials stored in the database.

🟢

If Mitigated

Limited impact with proper input validation, parameterized queries, and database user privilege restrictions in place.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

SQL injection vulnerabilities are commonly weaponized quickly, especially in popular WordPress plugins.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 2.14.4 or later

Vendor Advisory: https://patchstack.com/database/vulnerability/funnel-builder/wordpress-funnel-builder-for-wordpress-by-funnelkit-plugin-2-14-3-sql-injection-vulnerability

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Funnel Builder for WordPress by FunnelKit'. 4. Click 'Update Now' if available. 5. Alternatively, download version 2.14.4+ from WordPress.org and manually update.

🔧 Temporary Workarounds

Disable Plugin

all

Temporarily disable the vulnerable plugin until patched

wp plugin deactivate funnel-builder

Web Application Firewall

all

Implement WAF rules to block SQL injection patterns

🧯 If You Can't Patch

Implement strict input validation and sanitization for all user inputs
Restrict database user permissions to minimum required privileges

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin panel > Plugins > Funnel Builder for WordPress by FunnelKit version number

Check Version:

wp plugin get funnel-builder --field=version

Verify Fix Applied:

Verify plugin version is 2.14.4 or higher in WordPress admin

📡 Detection & Monitoring

Log Indicators:

Unusual SQL queries in database logs
Multiple failed login attempts from single IP
Unexpected database errors in WordPress logs

Network Indicators:

HTTP requests with SQL syntax in parameters
Unusual traffic patterns to WooCommerce endpoints

SIEM Query:

source="wordpress.log" AND ("SQL syntax" OR "database error" OR "funnel-builder")

📊 Metadata

CVE ID: CVE-2023-50856

CVSS v3 Score: 7.6 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L

CWE: CWE-89

Published: December 28, 2023

Last Updated: November 21, 2024

🔗 References

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