Is Klarna for WooCommerce safe to use?

Laskyr does not give safety verdicts. No known unpatched vulnerabilities in the latest version (4.13.6). As of 2026-11-04. 2 issues are on record for older versions; version 4.13.4 or newer fixes all of them that state a fix. Keep Klarna for WooCommerce on the latest version (4.13.6) and remove it if you do not use it.

Which versions of Klarna for WooCommerce are vulnerable?

Known issues on record (newest first): Missing authorization check (4.13.3 and older, fixed in 4.13.4); Missing authorization check (3.2.4 and older, fixed in 3.3.0). The full list with sources is on this page.

What is the latest version of Klarna for WooCommerce?

4.13.6, according to wordpress.org (last updated 2026-11-02). It has 20,000+ active installs.

What should I do if my Klarna for WooCommerce is out of date?

Take a backup, then update it from Dashboard > Updates (or run wp plugin update klarna-payments-for-woocommerce). If you cannot update right away, deactivate it until you can. If you think the site was already attacked, run a free scan at https://laskyr.com/scan.

Plugins · klarna-payments-for-woocommerce · data as of 2026-11-04

Is Klarna for WooCommerce safe? Known vulnerabilities and latest version

Latest version: 4.13.6
Last updated: 2026-11-02
Active installs: 20,000+
Known issues on record: 2
Unpatched in latest: 0
Tested up to WP: 7.1.4 · PHP 8.0+

Grow your business for increased sales and enhanced shopping experiences at no extra costs. — by Klarna

What to do

Update to the latest version (4.13.6). Anything older than 4.13.4 has at least one known issue listed below. Dashboard → Updates, or Plugins → “update now”.
If you cannot update right away, deactivate it until you can.
Turn on auto-updates for it: Plugins → “Enable auto-updates” on its row.
If you ran a vulnerable version and something looks off (spam pages, strange admins, redirects), run the free scan.

With WP-CLI: wp plugin get klarna-payments-for-woocommerce --field=version shows what you run; wp plugin update klarna-payments-for-woocommerce updates it.

Check your version

Known vulnerabilities

2 on record, newest first. “Affected” is the version range the source gives; “fixed in” is the version the source names, or (marked *) the first wordpress.org release after the last affected version.

high 7.5 CVE-2026-110590 · published 2026-10-16

Missing authorization check in Klarna for WooCommerce (4.13.3 and older)

Affected: 4.13.3 and older
Fixed in: 4.13.4 *
Access needed (per CVSS): No login needed
Range from: CVE record (the advisory publisher) · score by Wordfence

Details from the advisory

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.

NVD CVE-2026-110590 Wordfence advisory Code change (fix)github.com Plugin source

critical 9.8 CVE-2024-30477 · published 2024-03-29

Missing authorization check in Klarna for WooCommerce (3.2.4 and older)

Affected: 3.2.4 and older
Fixed in: 3.3.0
Access needed (per CVSS): No login needed
Range from: CVE record (the advisory publisher) · score by NVD

Details from the advisory

Missing Authorization vulnerability in Klarna Klarna Payments for WooCommerce.This issue affects Klarna Payments for WooCommerce: from n/a through 3.2.4.

NVD CVE-2024-30477 Patchstack advisory

Recent activity

2026-11-02 — latest release on wordpress.org (4.13.6).
2026-10-16 — Missing authorization check disclosed (CVE-2026-110590), fixed in 4.13.4.
2024-03-29 — Missing authorization check disclosed (CVE-2024-30477), fixed in 3.3.0.

Free. We check the CVE feeds every day and email you only when a new issue for Klarna for WooCommerce (klarna-payments-for-woocommerce) is published or a fix ships. Unsubscribe in one click.

Browse vulnerabilities

Types found in this plugin: Missing authorization (2)

Where this data comes from

Version, last update, installs: wordpress.org/plugins/klarna-payments-for-woocommerce (Plugins API), fetched 2026-11-04.
Vulnerabilities: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
Each record links to its CVE page and to the original advisory (Wordfence, Patchstack or WPScan) where there is one. We only list a CVE here when its references or its advisory name this exact plugin, so a few real issues may be missing; none should be about a different plugin. Spot an error? Email Daniel.

Badge for your site or docs (states facts with a date, not a verdict):

<a href="https://laskyr.com/plugins/klarna-payments-for-woocommerce"><img src="https://laskyr.com/plugins/klarna-payments-for-woocommerce/badge.svg" alt="Klarna for WooCommerce vulnerability status"></a>

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