CVE-2025-22318: WooCommerce Standard Box Sizes Plugin Flaw

CVE-2025-22318 Overview

CVE-2025-22318 is a Missing Authorization vulnerability affecting the Standard Box Sizes – for WooCommerce plugin (standard-box-sizes) developed by enituretechnology. This broken access control flaw allows unauthorized users to perform actions that should be restricted to authenticated administrators or users with specific capabilities, potentially compromising the integrity of WooCommerce shipping configurations.

Critical Impact

Unauthorized access to plugin functionality could allow attackers to manipulate box size configurations, potentially disrupting e-commerce shipping operations and affecting business logistics.

Affected Products

• Standard Box Sizes – for WooCommerce plugin versions up to and including 1.6.13
• WordPress installations running the vulnerable plugin versions
• WooCommerce stores utilizing the Standard Box Sizes plugin for shipping calculations

Discovery Timeline

• 2025-01-21 - CVE-2025-22318 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-22318

Vulnerability Analysis

This vulnerability is classified under CWE-862 (Missing Authorization), which occurs when software does not perform an authorization check when an actor attempts to access a resource or perform an action. In the context of WordPress plugins, this typically manifests when AJAX handlers or REST API endpoints fail to verify user capabilities before processing requests.

The Standard Box Sizes plugin provides functionality for WooCommerce stores to define and manage shipping box dimensions for accurate shipping cost calculations. When authorization checks are missing, any authenticated user—or potentially unauthenticated visitors depending on the specific endpoint—could invoke administrative functions intended only for shop managers or administrators.

Root Cause

The root cause of this vulnerability lies in the absence of proper capability checks within the plugin's request handling logic. WordPress provides functions such as current_user_can() and check_ajax_referer() to enforce authorization, but when these checks are omitted from critical functions, the plugin becomes susceptible to unauthorized access.

In properly secured WordPress plugins, administrative actions should verify that the requesting user possesses appropriate capabilities (e.g., manage_woocommerce or manage_options) before executing any state-changing operations.

Attack Vector

An attacker could exploit this vulnerability by crafting direct requests to vulnerable plugin endpoints. Since no authorization validation occurs, the attacker bypasses normal access controls.

The exploitation pathway typically involves:

1. Identifying exposed AJAX actions or REST endpoints within the plugin
2. Crafting HTTP requests that invoke administrative functionality
3. Submitting these requests without proper administrator credentials
4. Achieving unauthorized modification of plugin settings or data

For detailed technical information about this vulnerability, refer to the Patchstack vulnerability database entry.

Detection Methods for CVE-2025-22318

Indicators of Compromise

• Unexpected modifications to box size configurations without corresponding administrator activity
• Unusual HTTP requests targeting the Standard Box Sizes plugin endpoints from unauthorized sources
• Audit log entries showing plugin setting changes by non-administrative users
• Anomalous patterns in web server access logs related to standard-box-sizes plugin paths

Detection Strategies

• Monitor WordPress admin action logs for unauthorized changes to shipping box configurations
• Implement web application firewall (WAF) rules to detect and block suspicious requests to vulnerable plugin endpoints
• Review access logs for requests to plugin AJAX handlers from unexpected user agents or IP addresses
• Deploy file integrity monitoring to detect unauthorized modifications to plugin files or database entries

Monitoring Recommendations

• Enable comprehensive logging for all WooCommerce and plugin-related administrative actions
• Configure alerts for any changes to shipping configuration settings outside of normal business hours
• Regularly audit user permissions to ensure principle of least privilege is enforced
• Implement real-time monitoring of HTTP requests targeting WordPress AJAX endpoints

How to Mitigate CVE-2025-22318

Immediate Actions Required

• Update the Standard Box Sizes – for WooCommerce plugin to the latest patched version immediately
• Audit existing box size configurations to verify integrity and detect any unauthorized modifications
• Review user accounts and permissions to ensure no unauthorized escalation has occurred
• Temporarily disable the plugin if an immediate update is not possible and the functionality is non-critical

Patch Information

Users should update the Standard Box Sizes – for WooCommerce plugin to a version newer than 1.6.13 that addresses this authorization vulnerability. Check the WordPress plugin repository or contact enituretechnology for the latest secure version. Monitor the Patchstack advisory for updated remediation guidance.

Workarounds

• Restrict access to the WordPress admin area by IP address using web server configuration
• Implement a Web Application Firewall (WAF) with rules to block unauthorized requests to plugin endpoints
• Use WordPress security plugins that provide additional authorization enforcement layers
• Consider temporarily deactivating the plugin until an official patch is available if the risk is deemed unacceptable

# Example: Restrict wp-admin access by IP in .htaccess (Apache)
<Files wp-admin>
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from YOUR_TRUSTED_IP
</Files>