Is CVE-2026-14359 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-14359 being exploited in the wild.

How severe is CVE-2026-14359?

High severity, with a CVSS score of 8.8, published 9 September 2026.

Which products and versions are affected?

YITH WooCommerce Waitlist Premium up to and including 3.35.0.

Is there a fix for CVE-2026-14359?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-14359 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-14359?

Check whether you run YITH WooCommerce Waitlist Premium at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-14359: YITH WooCommerce Waitlist Premium privilege escalation

CVE-2026-14359 · Severity: high · CVSS 8.8 · Published 2026-09-09

The YITH WooCommerce Waitlist Premium plugin is used to manage customer notification lists when products are unavailable. A vulnerability allows authenticated users with basic Subscriber access to escalate their privileges to administrator by exploiting missing security checks in the plugin's AJAX handler. This enables complete takeover of the WordPress site, including access to customer data, payment information, and the ability to modify site content and settings.

Vendors: YITH.

Quick answers

Is CVE-2026-14359 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-14359 being exploited in the wild.
How severe is CVE-2026-14359?: High severity, with a CVSS score of 8.8, published 9 September 2026.
Which products and versions are affected?: YITH WooCommerce Waitlist Premium up to and including 3.35.0.
Is there a fix for CVE-2026-14359?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-14359 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-14359?: Check whether you run YITH WooCommerce Waitlist Premium at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability exists in the add_user_in_waiting_list() function registered on the wp_ajax_yith_wcwtl_add_user action, which lacks both capability checks and nonce verification. The function uses parse_str() and extract() to import attacker-controlled POST parameters, which are then passed unsanitized to wp_create_user() and user role assignment functions. An authenticated Subscriber-level attacker can send a crafted AJAX request to create a new administrator account, bypassing WordPress privilege controls. The vulnerability affects versions up to 3.35.0; patches should be available from the vendor.

Affected products

YITH WooCommerce Waitlist Premium up to and including 3.35.0

Timeline

2026-09-09: disclosed

References

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