CVE-2024-8434 – The Easy Mega Menu Plugin for WordPress has a m... (How to Fix)

📋 TL;DR

The Easy Mega Menu Plugin for WordPress has a missing capability check on AJAX functions, allowing authenticated users with subscriber-level access or higher to update plugin settings without proper authorization. This affects all versions up to and including 1.0.9 of the plugin.

💻 Affected Systems

Products:

ThemeHunk Mega Menu Plus WordPress Plugin

Versions: All versions up to and including 1.0.9

Operating Systems: Any OS running WordPress

Default Config Vulnerable: ⚠️ Yes

Notes: Affects WordPress installations with the vulnerable plugin enabled. Requires at least subscriber-level authenticated access.

📦 What is this software?

Mega Menu by Themehunk

View all CVEs affecting Mega Menu →

⚠️ Risk & Real-World Impact

🔴

Worst Case

An attacker with subscriber access could modify menu configurations, potentially redirecting users to malicious sites or disrupting site navigation.

🟠

Likely Case

Authenticated users could alter menu settings, causing site functionality issues or minor defacement.

🟢

If Mitigated

With proper user role management and network segmentation, impact would be limited to menu configuration changes within the affected site.

🌐 Internet-Facing: MEDIUM

🏢 Internal Only: LOW

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: LOW

Exploitation requires authenticated access and knowledge of AJAX endpoints. No public exploit code identified.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 1.1.0

Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3156084

Restart Required: No

Instructions:

1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find 'ThemeHunk Mega Menu Plus'
4. Click 'Update Now' if available
5. Or download version 1.1.0 from WordPress repository and manually update

🔧 Temporary Workarounds

Disable Plugin

all

Temporarily disable the vulnerable plugin until patched

wp plugin deactivate themehunk-megamenu-plus

Restrict User Registration

all

Disable new user registration to limit potential attackers

In WordPress Settings → General, uncheck 'Anyone can register'

🧯 If You Can't Patch

Implement strict user role management and review all subscriber-level accounts
Add web application firewall rules to block suspicious AJAX requests to the plugin endpoints

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin → Plugins → Installed Plugins for 'ThemeHunk Mega Menu Plus' version

Check Version:

wp plugin get themehunk-megamenu-plus --field=version

Verify Fix Applied:

Verify plugin version is 1.1.0 or higher in WordPress admin panel

📡 Detection & Monitoring

Log Indicators:

Unusual AJAX requests to /wp-admin/admin-ajax.php with action parameters related to megamenu functions from subscriber-level users

Network Indicators:

POST requests to admin-ajax.php with megamenu-related parameters from non-admin users

SIEM Query:

source="wordpress_logs" AND uri="/wp-admin/admin-ajax.php" AND (action="megamenu_*" OR params="megamenu_*") AND user_role="subscriber"

📊 Metadata

CVE ID: CVE-2024-8434

CVSS v3 Score: 4.3 (MEDIUM)

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

CWE: CWE-862

Published: September 25, 2024

Last Updated: December 17, 2024

🔗 References

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🔗 Related Vulnerabilities

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