CVE-2026-1750: WordPress Ecwid Privilege Escalation Flaw

CVE-2026-1750 Overview

The Ecwid by Lightspeed Ecommerce Shopping Cart plugin for WordPress contains a privilege escalation vulnerability in all versions up to and including 7.0.7. The vulnerability exists due to a missing capability check in the save_custom_user_profile_fields function, which allows authenticated attackers with minimal permissions (such as subscribers) to elevate their privileges to store manager access.

Critical Impact

Authenticated attackers with low-privilege accounts can exploit this vulnerability to gain store manager access, potentially compromising e-commerce operations, customer data, and financial transactions.

Affected Products

• Ecwid by Lightspeed Ecommerce Shopping Cart plugin for WordPress versions up to and including 7.0.7
• WordPress sites with the Ecwid Shopping Cart plugin installed and user registration enabled
• E-commerce stores using the affected plugin with any authenticated user accounts

Discovery Timeline

• 2026-02-15 - CVE CVE-2026-1750 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2026-1750

Vulnerability Analysis

This vulnerability is classified as CWE-269 (Improper Privilege Management), which occurs when the software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control. In this case, the save_custom_user_profile_fields function fails to verify that the user making the request has appropriate administrative capabilities before processing profile field updates.

The vulnerable function processes user profile updates without validating the requestor's capability level. When a user submits a profile update request containing the ec_store_admin_access parameter, the function blindly accepts and stores this value, effectively granting the user store manager privileges regardless of their actual role in the WordPress system.

This type of vulnerability is particularly dangerous in e-commerce environments where store manager access typically includes the ability to view orders, manage products, access customer information, and potentially modify payment settings.

Root Cause

The root cause of this vulnerability is a missing capability check in the save_custom_user_profile_fields function within the class-ec-store-admin-access.php file. The function processes user-supplied input for the ec_store_admin_access parameter without first verifying that the current user has the necessary permissions to modify store access settings. This violates the principle of least privilege and allows any authenticated user to escalate their privileges.

Attack Vector

The attack vector is network-based and requires only low-privilege authentication. An attacker can exploit this vulnerability through the following method:

1. The attacker registers or obtains access to a low-privilege WordPress account (e.g., subscriber role)
2. The attacker initiates a profile update request to their own user profile
3. During the update request, the attacker includes the ec_store_admin_access parameter with a value that grants store manager access
4. The vulnerable save_custom_user_profile_fields function processes this request without capability verification
5. The attacker's account is elevated to store manager, granting access to sensitive e-commerce functionality

The vulnerability requires no user interaction and can be exploited remotely over the network by any authenticated user, making it a significant threat to affected WordPress e-commerce sites.

Detection Methods for CVE-2026-1750

Indicators of Compromise

• Unexpected changes to user roles or permissions in the WordPress database, particularly the ec_store_admin_access user meta field
• Subscriber or other low-privilege accounts suddenly gaining access to store management features
• Unusual activity in WooCommerce or Ecwid store management areas from accounts that should not have access
• HTTP POST requests to profile update endpoints containing the ec_store_admin_access parameter from non-administrator users

Detection Strategies

• Monitor WordPress user meta table for unauthorized modifications to the ec_store_admin_access field
• Implement logging for all profile update requests and flag any containing store access parameters from low-privilege users
• Deploy web application firewall (WAF) rules to detect and block profile update requests containing privilege escalation parameters
• Regularly audit user permissions and compare against expected role assignments

Monitoring Recommendations

• Enable comprehensive WordPress activity logging to track profile modifications and permission changes
• Configure alerts for any user meta changes related to store access privileges
• Monitor authentication logs for low-privilege accounts accessing store management endpoints
• Implement file integrity monitoring on the Ecwid plugin files to detect unauthorized modifications

How to Mitigate CVE-2026-1750

Immediate Actions Required

• Update the Ecwid by Lightspeed Ecommerce Shopping Cart plugin to a version newer than 7.0.7 immediately
• Audit all user accounts for unexpected store manager access and revoke any unauthorized privileges
• Review recent profile update activity logs to identify potential exploitation attempts
• Consider temporarily disabling user registration or the Ecwid plugin until patching is complete

Patch Information

A patch for this vulnerability is available. The fix can be reviewed in the WordPress Plugin Changeset History. The vulnerable code is located in the class-ec-store-admin-access.php file as documented in the WordPress Plugin Code Review. Additional details are available in the Wordfence Vulnerability Report.

Workarounds

• Restrict user registration on WordPress sites using the affected plugin until the patch is applied
• Implement additional server-side validation through a custom plugin or code snippet to block profile updates containing the ec_store_admin_access parameter from non-administrators
• Use a web application firewall to filter requests containing privilege escalation parameters
• Temporarily disable the Ecwid plugin if store functionality is not immediately critical

# Configuration example
# WordPress wp-config.php - Disable user registration temporarily
define('WP_ALLOW_MULTISITE', false);

# Add to .htaccess to block suspicious profile update parameters
# RewriteEngine On
# RewriteCond %{REQUEST_METHOD} POST
# RewriteCond %{QUERY_STRING} ec_store_admin_access [NC]
# RewriteRule .* - [F,L]