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CVE-2026-110590

7.5 · HIGH

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 au…

Published Oct 16, 2026CWE-862EPSS 0.33%

Overview

CVE-2026-110590 is a high-severity vulnerability. It was published on October 16, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/krokedil/klarna-payments-for-woocommerce/compare/4.13.3...f5362605a9901b7f9264cfa3b22fd782a7a3097bRefplugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/class-kp-assets.php#L159Refplugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/class-kp-assets.php#L185Refplugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/class-kp-assets.php#L198Refplugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/class-kp-assets.php#L204Refplugins.trac.wordpress.org/changeset/3740915/klarna-payments-for-woocommerce/trunk/classes/class-kp-assets.phpRefwww.wordfence.com/threat-intel/vulnerabilities/id/c3abb96e-6ee2-4992-a122-9f661da9a4d6?source=cve

How CyberStrike helps

Frequently asked questions

What is CVE-2026-110590?

CVE-2026-110590 is a high-severity vulnerability. It was published on October 16, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-110590?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-110590?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-110590?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-110590 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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