CVE-2025-14357: Mega Store WooCommerce Auth Bypass Flaw

CVE-2025-14357 Overview

CVE-2025-14357 is a Missing Authorization vulnerability (CWE-862) affecting the Mega Store WooCommerce theme for WordPress. The vulnerability exists due to a missing capability check on the setup_widgets() function in core/includes/importer/whizzie.php in all versions up to, and including, 5.9. This security flaw makes it possible for authenticated attackers, with Subscriber-level access and above, to create arbitrary pages and modify site settings without proper authorization.

Critical Impact

Authenticated attackers with minimal privileges (Subscriber-level) can bypass authorization controls to create arbitrary pages and modify critical WordPress site settings, potentially leading to site defacement, SEO spam injection, or further exploitation.

Affected Products

• Mega Store WooCommerce Theme versions up to and including 5.9
• WordPress installations using the vulnerable theme
• WooCommerce-powered e-commerce sites with the Mega Store theme installed

Discovery Timeline

• 2026-02-19 - CVE CVE-2025-14357 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2025-14357

Vulnerability Analysis

This vulnerability represents a classic Missing Authorization flaw where the setup_widgets() function in the theme's importer module fails to verify whether the requesting user has appropriate capabilities before executing privileged operations. The function is located in core/includes/importer/whizzie.php at line 668.

WordPress implements a robust capability system where administrative functions should verify user permissions using functions like current_user_can(). When these checks are absent, lower-privileged users can invoke functionality intended only for administrators. In this case, authenticated users with Subscriber-level access can exploit the unprotected endpoint to perform administrative actions including page creation and settings modification.

The network-accessible nature of this vulnerability means that any authenticated user on the WordPress instance can potentially exploit it, significantly expanding the attack surface for multi-author blogs or membership sites.

Root Cause

The root cause of CVE-2025-14357 is the complete absence of capability checks within the setup_widgets() function. WordPress security best practices mandate that any function performing privileged operations must verify user capabilities before execution. The whizzie.php importer module, designed to facilitate theme setup wizards, neglects to implement these authorization controls, allowing any authenticated user to invoke administrative functionality.

The vulnerable code path can be reached by any logged-in user, as the WordPress REST API or AJAX handlers exposing this function do not enforce capability requirements at either the endpoint registration level or within the function itself.

Attack Vector

The attack requires network access and authentication, but only at the lowest privilege tier (Subscriber). An attacker can exploit this vulnerability by:

1. Registering or compromising a Subscriber-level WordPress account
2. Sending crafted requests to the vulnerable setup_widgets() function endpoint
3. Manipulating parameters to create arbitrary pages or modify site settings
4. Using the unauthorized access to inject malicious content, modify SEO settings, or establish persistence

The vulnerability is exploited through the theme's importer functionality, which typically processes widget configurations and page templates during initial theme setup. Technical details of the vulnerable code path can be reviewed in the WordPress Mega Store WooCommerce Importer Code.

Detection Methods for CVE-2025-14357

Indicators of Compromise

• Unexpected pages created in WordPress with unfamiliar content or spam
• Unauthorized modifications to widget areas or theme settings
• Unusual activity from Subscriber-level accounts in audit logs
• Web server logs showing requests to /wp-admin/admin-ajax.php with importer-related actions from non-admin users

Detection Strategies

• Monitor WordPress audit logs for page creation events by low-privilege users
• Implement file integrity monitoring on wp-content/themes/mega-store-woocommerce/ directory
• Review web application firewall logs for suspicious POST requests to theme importer endpoints
• Deploy endpoint detection to identify unauthorized WordPress administrative actions

Monitoring Recommendations

• Enable comprehensive logging for all WordPress user actions using security plugins
• Configure alerts for settings modifications or page creations by non-administrative users
• Implement real-time monitoring of the wp_posts and wp_options database tables for unauthorized changes
• Review Subscriber-level account activity regularly for anomalous behavior patterns

How to Mitigate CVE-2025-14357

Immediate Actions Required

• Update the Mega Store WooCommerce theme to the latest patched version beyond 5.9
• Audit all pages and site settings for unauthorized modifications
• Review Subscriber-level accounts for potential compromise or malicious registrations
• Consider temporarily restricting user registration if the theme cannot be immediately updated

Patch Information

The vulnerability affects Mega Store WooCommerce theme versions up to and including 5.9. Site administrators should check the WordPress theme repository for an updated version that includes the authorization fix. The patch should add proper capability checks using WordPress's current_user_can() function before allowing the setup_widgets() function to execute.

For additional technical details and vulnerability verification, refer to the Wordfence Vulnerability Report.

Workarounds

• Disable user registration temporarily to prevent new Subscriber accounts from being created
• Remove or deactivate the Mega Store WooCommerce theme until a patch is available
• Implement web application firewall rules to block requests to the vulnerable importer endpoint
• Manually add capability checks to whizzie.php if comfortable with code modification (temporary measure)

# Check current theme version
wp theme get mega-store-woocommerce --field=version

# Update theme to latest version
wp theme update mega-store-woocommerce

# List all subscriber-level users for audit
wp user list --role=subscriber --format=table

# Review recently created pages
wp post list --post_type=page --orderby=date --order=desc --format=table