Klarna for WooCommerce <= 4.13.3 - Missing Authorization to Unauthenticated Sensitive Information Disclosure via 'order-pay' Endpoint

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-110590
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-16 05:17:29 UTC
Updated2026-10-16 05:17:29 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Klarnaplugin Klarna For WooCommerce affected 4.13.3 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/c... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/c... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/c3abb96e-6ee2-4992-a122-9f661... [email protected] www.wordfence.com
plugins.trac.wordpress.org/changeset/3740915/klarna-payments-for-woocommerce/trunk/class... [email protected] plugins.trac.wordpress.org
github.com/krokedil/klarna-payments-for-woocommerce/compare/4.13.3...f53... [email protected] github.com
plugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/c... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/klarna-payments-for-woocommerce/tags/4.13.3/classes/c... [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Kuba (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-10-14T15:00:10.000ZVendor Notified
CNA2026-10-15T15:50:36.000ZDisclosed

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