---
id: CVE-2026-110590
title: >-
  The Klarna for WooCommerce plugin for WordPress is vulnerable to authorization
  bypass in all versions up to, and including, 4.13.3 This is due to the plugin
  not properly verifying that a user is authorized to perform an action
summary: >-
  The Klarna for WooCommerce plugin for WordPress is vulnerable to authorization
  bypass in all versions up to, and including, 4.13.3 This is due to the plugin
  not properly verifying that a user is authorized to perform an action. This
  make…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-862
vendor: klarnaplugin
product: Klarna for WooCommerce
affected:
  - klarna_for_woocommerce <= 4.13.3
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:17:11.547'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110590'
references:
  - url: >-
      https://github.com/krokedil/klarna-payments-for-woocommerce/compare/4.13.3...f5362605a9901b7f9264cfa3b22fd782a7a3097b
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/class-kp-assets.php#L159
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/class-kp-assets.php#L185
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/class-kp-assets.php#L198
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/class-kp-assets.php#L204
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3740915/klarna-payments-for-woocommerce/trunk/classes/class-kp-assets.php
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/c3abb96e-6ee2-4992-a122-9f661da9a4d6?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
epss: 0.00325
epssPercentile: 0.25386
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-16T14:57:42.888860Z'
ingestedAt: '2026-10-16T04:58:47.492Z'
---

## Overview

The Klarna for WooCommerce plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.13.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to access any order's secret order_key and full billing and shipping PII — including first name, last name, email address, phone number, street address, postcode, city, region, and country — emitted inline as the klarna_payments_params JavaScript variable, enabling full store-wide order enumeration. Because WooCommerce order IDs are sequential integers and no order_key or authenticated session is required, every order in the store can be trivially enumerated with sequential GET requests to the order-pay endpoint.

## Remediation

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