HomeWordPress vulnerabilitiesKlarna for WooCommerce
Klarna for WooCommerce vulnerabilities
Klarna for WooCommerce has 1 known vulnerability in this database. The most recent published record is dated 16 Oct 2026.
- Known vulnerabilities
- 1
- Active installs
- 20,000+
- Latest version
- 4.13.4
- Last updated
- 12 Oct 2026
- Most recent
- 16 Oct 2026
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Broken access control CVE-2026-110590 | High 7.5 | Up to 4.13.3 | Fixed in a later version (latest 4.13.4) | 3 d ago |
Read the published descriptions
- CVE-2026-110590, 16 Oct 2026
- 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. CVE record
What to do if you run Klarna for WooCommerce
If you run Klarna for WooCommerce, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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