---
id: CVE-2026-17553
title: >-
  The WP EasyCart plugin for WordPress is vulnerable to privilege escalation in
  versions up to, and including, 5.9.3
summary: >-
  The WP EasyCart plugin for WordPress is vulnerable to privilege escalation in
  versions up to, and including, 5.9.3. This is due to the
  ec_ajax_save_page_default_options() AJAX handler iterating over every $_POST
  key and passing it direct…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-269
vendor: levelfourstorefront
product: Shopping Cart & eCommerce Store
affected:
  - shopping_cart_ecommerce_store <= 5.9.3
published: '2026-09-09'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T15:33:34.467'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-17553'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/admin/inc/wp_easycart_admin.php#L209
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/design/layout/base-responsive-v3/ec_product_page.php#L415
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7103
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7107
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-easycart/tags/5.9.1/wpeasycart.php#L7110
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3681924%40wp-easycart&new=3681924%40wp-easycart
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/08e62276-f004-48ca-bb00-2f81e6ac4892?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-09T13:13:11.443033Z'
ingestedAt: '2026-09-09T03:58:58.113Z'
epss: 0.00428
epssPercentile: 0.34429
---

## Overview

The WP EasyCart plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 5.9.3. This is due to the ec_ajax_save_page_default_options() AJAX handler iterating over every $_POST key and passing it directly into update_option() without any allowlist, while gating the handler only on 'manage_options' OR the plugin's custom 'wpec_manager' capability. The plugin's built-in 'wpec_store_manager' role holds 'wpec_manager' but not 'manage_options', and the required nonce is emitted on frontend product/category templates that render for any user with 'wpec_manager'. This makes it possible for authenticated attackers, with Store Manager-level access and above, to elevate their privileges to administrator by updating arbitrary WordPress options such as default_role='administrator' and users_can_register='1', then self-registering a new account that is assigned the administrator role.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.