CVE-2026-24366: YITH WooCommerce Authorization Bypass

CVE-2026-24366 Overview

A Missing Authorization vulnerability has been identified in the YITH WooCommerce Request A Quote plugin (yith-woocommerce-request-a-quote) for WordPress. This Broken Access Control flaw allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized actions within affected WordPress installations.

Critical Impact

Unauthenticated attackers can exploit this vulnerability over the network to bypass authorization controls and perform unauthorized modifications on affected WordPress sites running vulnerable versions of the YITH WooCommerce Request A Quote plugin.

Affected Products

• YITH WooCommerce Request A Quote versions up to and including 2.46.0
• WordPress installations with the yith-woocommerce-request-a-quote plugin enabled
• E-commerce sites utilizing YITH quote request functionality

Discovery Timeline

• 2026-01-22 - CVE-2026-24366 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2026-24366

Vulnerability Analysis

This vulnerability is classified as CWE-862 (Missing Authorization), a common flaw in web applications where critical functions lack proper authorization checks. In the context of the YITH WooCommerce Request A Quote plugin, the vulnerability allows unauthorized access to functionality that should be restricted to authenticated users or administrators.

The plugin fails to properly verify user permissions before executing certain operations, allowing any user—including unauthenticated visitors—to perform actions that should require higher privileges. This type of Broken Access Control vulnerability can lead to unauthorized data modification, potentially affecting the integrity of quote requests, customer information, or plugin settings.

Root Cause

The root cause of this vulnerability lies in missing authorization checks within the plugin's codebase. When processing requests, the plugin does not adequately validate whether the requesting user has the appropriate permissions to perform the requested action. This oversight enables attackers to bypass the intended access control mechanisms by directly invoking functionality without proper authentication or role verification.

Attack Vector

The vulnerability is exploitable remotely over the network without requiring authentication or user interaction. An attacker can craft malicious HTTP requests directly to the vulnerable WordPress site to exploit the missing authorization checks.

The attack scenario involves:

1. Identifying a WordPress site running a vulnerable version of the YITH WooCommerce Request A Quote plugin
2. Crafting requests to access protected functionality without proper authorization
3. Exploiting the missing permission checks to perform unauthorized modifications

Since no authentication is required and the attack complexity is low, this vulnerability presents a realistic threat to affected installations. The primary impact is to system integrity, as attackers can modify data without authorization.

Detection Methods for CVE-2026-24366

Indicators of Compromise

• Unexpected modifications to quote requests or plugin settings without corresponding administrative actions
• Unusual HTTP requests to YITH WooCommerce Request A Quote plugin endpoints from unauthenticated sources
• Log entries showing successful operations on protected resources without valid user sessions

Detection Strategies

• Monitor web server access logs for suspicious requests targeting /wp-content/plugins/yith-woocommerce-request-a-quote/ paths
• Implement Web Application Firewall (WAF) rules to detect and block unauthorized access attempts to plugin functionality
• Review WordPress audit logs for unexpected changes to quote-related data or plugin configurations

Monitoring Recommendations

• Enable detailed logging for the YITH WooCommerce Request A Quote plugin and related WordPress operations
• Configure alerts for unauthorized modification attempts on protected resources
• Regularly audit plugin activity logs for anomalous behavior patterns

How to Mitigate CVE-2026-24366

Immediate Actions Required

• Update the YITH WooCommerce Request A Quote plugin to a patched version (newer than 2.46.0) immediately
• Review recent quote requests and plugin configurations for unauthorized modifications
• Consider temporarily disabling the plugin if an update is not immediately available
• Implement additional access controls at the web server or WAF level to restrict plugin endpoint access

Patch Information

Security updates addressing this vulnerability should be obtained from the official YITH plugin distribution channels. Administrators should update to a version newer than 2.46.0 to remediate this issue. For detailed information about this vulnerability, refer to the Patchstack Vulnerability Report.

Workarounds

• Restrict access to WordPress administrative endpoints and plugin functionality using web server configuration or firewall rules
• Implement additional authentication layers for sensitive plugin operations
• Use security plugins that provide virtual patching capabilities until an official update can be applied
• Limit plugin functionality to authenticated users only through WordPress role-based access controls

# Example: Restrict access to plugin directory via .htaccess (Apache)
<Directory /var/www/html/wp-content/plugins/yith-woocommerce-request-a-quote/>
    <RequireAll>
        Require all denied
        Require ip 127.0.0.1
        Require ip your_admin_ip
    </RequireAll>
</Directory>