CVE-2025-31865: CartBoss Authorization Bypass Vulnerability

CVE-2025-31865 Overview

CVE-2025-31865 is a missing authorization vulnerability in the CartBoss WordPress plugin. The flaw affects all versions up to and including 4.1.2. It stems from incorrectly configured access control security levels, allowing authenticated users with low privileges to interact with plugin functionality that should require higher authorization. The issue is tracked under CWE-862: Missing Authorization.

Critical Impact
Authenticated attackers with low-level privileges can bypass access controls in the CartBoss plugin, leading to limited integrity impact on affected WordPress sites.

Affected Products

CartBoss WordPress plugin versions through 4.1.2
WordPress sites with the CartBoss plugin installed and activated
E-commerce environments relying on CartBoss cart recovery functionality

Discovery Timeline

2025-04-01 - CVE-2025-31865 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-31865

Vulnerability Analysis

The CartBoss plugin fails to enforce proper authorization checks on one or more of its endpoints or actions. WordPress plugins commonly expose functionality through AJAX handlers, REST API routes, or admin-post actions. Each of these must validate the acting user's capabilities before performing sensitive operations.

In CartBoss versions up to 4.1.2, the plugin exposes functionality without validating that the calling user holds the correct WordPress capability. An authenticated user, such as a subscriber or customer account, can invoke actions intended for administrators or shop managers. This bypasses the plugin's intended access model.

The attack requires network access and prior authentication with low privileges. No user interaction is required to complete exploitation.

Root Cause

The root cause is missing or incorrectly configured authorization enforcement inside the plugin's request handlers. WordPress provides current_user_can() capability checks and REST API permission_callback functions for this purpose. When these checks are omitted, misconfigured, or set to overly permissive callbacks such as __return_true, any authenticated user can invoke the handler.

Attack Vector

An attacker first authenticates to the target WordPress site using any valid low-privileged account. The attacker then issues a crafted HTTP request to the vulnerable CartBoss endpoint, invoking functionality that should be restricted. Because the plugin does not verify capabilities, the request succeeds and modifies plugin state or data. Full technical detail is available in the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-31865

Indicators of Compromise

Unexpected changes to CartBoss plugin settings, campaigns, or cart data authored by non-administrative user accounts
Access log entries showing low-privileged users issuing POST requests to CartBoss AJAX or REST endpoints such as /wp-admin/admin-ajax.php with CartBoss action parameters
Unexplained modifications to abandoned cart records or outbound notification templates

Detection Strategies

Audit WordPress access logs for requests to CartBoss endpoints originating from subscriber, customer, or contributor accounts
Enumerate all registered CartBoss AJAX actions and REST routes, then confirm each has a valid permission_callback or capability check
Deploy a web application firewall rule that flags CartBoss endpoint invocations by users lacking the manage_options or manage_woocommerce capability

Monitoring Recommendations

Enable WordPress audit logging plugins to record all plugin configuration changes and correlate them with the acting user ID
Monitor for anomalous spikes in authenticated requests to admin-ajax.php referencing CartBoss actions
Forward WordPress and web server logs to a centralized SIEM or data lake for correlation and long-term retention

How to Mitigate CVE-2025-31865

Immediate Actions Required

Update the CartBoss plugin to a version newer than 4.1.2 as soon as a patched release is available
Review WordPress user accounts and disable or remove any unnecessary low-privileged accounts
Audit CartBoss configuration and recent cart activity for signs of unauthorized changes

Patch Information

At the time of publication, the vulnerability affects CartBoss versions from an unspecified initial version through 4.1.2. Site administrators should consult the Patchstack Vulnerability Report for the latest patched version information and vendor guidance.

Workarounds

Deactivate the CartBoss plugin until a patched version can be installed if the plugin is not business-critical
Restrict access to /wp-admin/admin-ajax.php and REST API routes through a web application firewall, limiting CartBoss actions to trusted IP ranges
Enforce strong authentication, including multi-factor authentication, on all WordPress accounts to reduce the pool of attackers who can meet the low-privilege prerequisite

bash

# Example: block CartBoss AJAX actions for unauthenticated and low-privileged users via .htaccess
<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteCond %{QUERY_STRING} action=cartboss_ [NC]
  RewriteCond %{HTTP_COOKIE} !wordpress_logged_in_.*admin [NC]
  RewriteRule ^wp-admin/admin-ajax\.php$ - [F,L]
</IfModule>