CVE-2024-7257 – The YayExtra WooCommerce plugin for WordPress h... (How to Fix)

Q: What is the severity of CVE-2024-7257?

CVE-2024-7257 has a CVSS score of 9.8 (CRITICAL). The YayExtra WooCommerce plugin for WordPress has a critical vulnerability allowing unauthenticated attackers to upload arbitrary files due to missing file type validation. This can lead to remote code execution on affected websites. All WordPress sites using YayExtra plugin versions up to 1.3.7 are vulnerable.

📋 TL;DR

The YayExtra WooCommerce plugin for WordPress has a critical vulnerability allowing unauthenticated attackers to upload arbitrary files due to missing file type validation. This can lead to remote code execution on affected websites. All WordPress sites using YayExtra plugin versions up to 1.3.7 are vulnerable.

💻 Affected Systems

Products:

YayExtra – WooCommerce Extra Product Options WordPress plugin

Versions: All versions up to and including 1.3.7

Operating Systems: Any OS running WordPress

Default Config Vulnerable: ⚠️ Yes

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

⚠️ 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

Complete server compromise via remote code execution, allowing attackers to install malware, steal data, deface websites, or use the server for further attacks.

🟠

Likely Case

Attackers upload web shells or malicious scripts to gain persistent access, deface websites, or install cryptocurrency miners.

🟢

If Mitigated

File uploads blocked or restricted, preventing exploitation but potentially affecting legitimate plugin functionality.

🌐 Internet-Facing: HIGH - WordPress sites are typically internet-facing, and unauthenticated exploitation makes this easily accessible to attackers.

🏢 Internal Only: LOW - WordPress plugins are typically deployed on internet-facing web servers, not internal-only systems.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Simple file upload vulnerability with public proof-of-concept available. Attackers can easily automate exploitation.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 1.3.8 or later

Vendor Advisory: https://wordpress.org/plugins/yayextra/#developers

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Go to Plugins → Installed Plugins. 3. Find YayExtra plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete plugin immediately.

🔧 Temporary Workarounds

Disable plugin

all

Deactivate the YayExtra plugin to prevent exploitation

wp plugin deactivate yayextra

Web server file upload restrictions

all

Configure web server to block file uploads to vulnerable endpoints

# Apache: Add to .htaccess
<FilesMatch "\.(php|phtml|php3|php4|php5|php7|phps|php-s|pht|phar|shtml|sh|cgi|pl|asp|aspx|jsp|py|rb|exe|dll|bat|cmd|ps1|sh|bash|zsh|ksh|csh|tcsh|fish)">
    Order Allow,Deny
    Deny from all
</FilesMatch>
# Nginx: Add to server block
location ~* \.(php|phtml|php3|php4|php5|php7|phps|php-s|pht|phar|shtml|sh|cgi|pl|asp|aspx|jsp|py|rb|exe|dll|bat|cmd|ps1|sh|bash|zsh|ksh|csh|tcsh|fish)$ {
    deny all;
}

🧯 If You Can't Patch

Immediately deactivate and remove the YayExtra plugin from all WordPress installations
Implement web application firewall (WAF) rules to block file uploads to the vulnerable endpoint

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin → Plugins → Installed Plugins for YayExtra version. If version is 1.3.7 or lower, you are vulnerable.

Check Version:

wp plugin get yayextra --field=version

Verify Fix Applied:

After update, verify YayExtra plugin version is 1.3.8 or higher in WordPress admin panel.

📡 Detection & Monitoring

Log Indicators:

Unusual file uploads to /wp-content/uploads/yayextra/ directory
POST requests to /wp-admin/admin-ajax.php with action=yayextra_upload_file
Files with suspicious extensions (.php, .phtml, .phar) in upload directories

Network Indicators:

POST requests to admin-ajax.php with file upload parameters
Unusual outbound connections from web server after file upload

SIEM Query:

source="web_server_logs" AND (uri="/wp-admin/admin-ajax.php" AND parameters CONTAINS "yayextra_upload_file") AND (response_code=200 OR response_code=302)

📊 Metadata

CVE ID: CVE-2024-7257

CVSS v3 Score: 9.8 (CRITICAL)

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

CWE: CWE-434

Published: August 3, 2024

Last Updated: August 5, 2024

🔗 References

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