CVE-2024-6123 – The Bit Form WordPress plugin allows authentica... (How to Fix)

Q: What is the severity of CVE-2024-6123?

CVE-2024-6123 has a CVSS score of 7.2 (HIGH). The Bit Form WordPress plugin allows authenticated attackers with administrator permissions to upload arbitrary files due to missing file type validation. This vulnerability can lead to remote code execution on affected WordPress sites. Only WordPress sites using vulnerable versions of the Bit Form plugin are affected.

📋 TL;DR

The Bit Form WordPress plugin allows authenticated attackers with administrator permissions to upload arbitrary files due to missing file type validation. This vulnerability can lead to remote code execution on affected WordPress sites. Only WordPress sites using vulnerable versions of the Bit Form plugin are affected.

💻 Affected Systems

Products:

Bit Form WordPress Plugin

Versions: All versions up to and including 2.13.3

Operating Systems: All

Default Config Vulnerable: ⚠️ Yes

Notes: Requires authenticated administrator-level access to exploit.

⚠️ Manual Verification Required

This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.

Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).

🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.

Recommended Actions:

Review the CVE details at NVD
Check vendor security advisories for your specific version
Test if the vulnerability is exploitable in your environment
Consider updating to the latest version as a precaution

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete server compromise, data theft, malware deployment, or site defacement.

🟠

Likely Case

Unauthorized file upload leading to webshell installation and persistent backdoor access.

🟢

If Mitigated

Limited impact with proper file upload restrictions and administrator account security.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ✅ No

Complexity: LOW

Exploitation requires administrator credentials but is technically simple once authenticated.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 2.13.4 and later

Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3114814/bit-form/trunk/includes/Admin/AdminAjax.php

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Bit Form plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 2.13.4+ from WordPress.org and manually update.

🔧 Temporary Workarounds

Disable Bit Form Plugin

all

Temporarily disable the vulnerable plugin until patched.

wp plugin deactivate bit-form

Restrict File Uploads via .htaccess

linux

Block execution of uploaded files in upload directories.

Add to .htaccess in wp-content/uploads: <Files *.php> deny from all </Files>

🧯 If You Can't Patch

Implement strict file upload validation at web server level
Monitor administrator account activity and implement multi-factor authentication

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin panel → Plugins → Bit Form → Version number. If version is 2.13.3 or lower, you are vulnerable.

Check Version:

wp plugin get bit-form --field=version

Verify Fix Applied:

Verify Bit Form plugin version is 2.13.4 or higher in WordPress admin panel.

📡 Detection & Monitoring

Log Indicators:

Unusual file uploads to wp-content/uploads via /wp-admin/admin-ajax.php
POST requests to iconUpload endpoint with non-image files

Network Indicators:

HTTP POST to /wp-admin/admin-ajax.php with action=iconUpload containing executable files

SIEM Query:

source="web_access.log" AND uri="/wp-admin/admin-ajax.php" AND method="POST" AND params.action="iconUpload" AND NOT params.filetype IN ("image/jpeg", "image/png", "image/gif")

📊 Metadata

CVE ID: CVE-2024-6123

CVSS v3 Score: 7.2 (HIGH)

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

CWE: CWE-434

Published: July 9, 2024

Last Updated: November 21, 2024

🔗 References

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