CVE-2023-51547 – This SQL injection vulnerability in the Fluent ... (How to Fix)

Q: What is the severity of CVE-2023-51547?

CVE-2023-51547 has a CVSS score of 7.6 (HIGH). This SQL injection vulnerability in the Fluent Support WordPress plugin allows attackers to execute arbitrary SQL commands through the plugin's interface. It affects all WordPress sites running Fluent Support versions up to 1.7.6. Attackers could potentially access, modify, or delete database content.

📋 TL;DR

This SQL injection vulnerability in the Fluent Support WordPress plugin allows attackers to execute arbitrary SQL commands through the plugin's interface. It affects all WordPress sites running Fluent Support versions up to 1.7.6. Attackers could potentially access, modify, or delete database content.

💻 Affected Systems

Products:

Fluent Support – WordPress Helpdesk and Customer Support Ticket Plugin

Versions: All versions up to and including 1.7.6

Operating Systems: Any OS running WordPress

Default Config Vulnerable: ⚠️ Yes

Notes: Affects all WordPress installations with vulnerable plugin versions enabled.

📦 What is this software?

Fluent Support by Wpmanageninja

View all CVEs affecting Fluent Support →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete database compromise including sensitive customer support data, user credentials, and potential privilege escalation to WordPress administrator.

🟠

Likely Case

Data exfiltration of customer support tickets, user information, and potential site defacement or malware injection.

🟢

If Mitigated

Limited impact if proper input validation and WAF rules are in place, potentially only error messages or partial data exposure.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ✅ No

Complexity: LOW

SQL injection vulnerabilities in WordPress plugins are frequently weaponized. Authentication requirements are not specified in available references.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 1.7.7 or later

Vendor Advisory: https://patchstack.com/database/vulnerability/fluent-support/wordpress-fluent-support-plugin-1-7-6-sql-injection-vulnerability

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Fluent Support plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 1.7.7+ from WordPress.org and manually update.

🔧 Temporary Workarounds

Disable Plugin

all

Temporarily disable the Fluent Support plugin until patched.

wp plugin deactivate fluent-support

Web Application Firewall Rules

all

Implement WAF rules to block SQL injection patterns targeting Fluent Support endpoints.

🧯 If You Can't Patch

Implement strict input validation and parameterized queries at application level
Restrict database user permissions to minimum required for plugin functionality

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin panel > Plugins > Installed Plugins for Fluent Support version 1.7.6 or earlier.

Check Version:

wp plugin get fluent-support --field=version

Verify Fix Applied:

Verify plugin version is 1.7.7 or later in WordPress admin panel.

📡 Detection & Monitoring

Log Indicators:

Unusual SQL queries in database logs
Multiple failed login attempts through Fluent Support endpoints
Unexpected database errors in WordPress debug logs

Network Indicators:

SQL injection patterns in HTTP requests to /wp-content/plugins/fluent-support/
Unusual outbound database connections from web server

SIEM Query:

web.url:*fluent-support* AND (web.query:*SELECT* OR web.query:*UNION* OR web.query:*' OR '1'='1*)

📊 Metadata

CVE ID: CVE-2023-51547

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 31, 2023

Last Updated: November 21, 2024

🔗 References

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