CVE-2026-1305: The Japanized for WooCommerce plugin for WordPress is vulnerable to Improper Authentication in versions up to, and including, 2.8.4. This is due to a flawed…

PriorityP336medium5.3CVSS 3.1

AVNACLPRNUINSUCNILAN

EPSS

0.41%

32.5th percentile

The Japanized for WooCommerce plugin for WordPress is vulnerable to Improper Authentication in versions up to, and including, 2.8.4. This is due to a flawed permission check in the `paidy_webhook_permission_check` function that unconditionally returns `true` when the webhook signature header is omitted. This makes it possible for unauthenticated attackers to bypass payment verification and fraudulently mark orders as "Processing" or "Completed" without actual payment via a crafted POST request to the Paidy webhook endpoint.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
shoheitanaka	japanized_for_woocommerce	<= 2.8.4	—

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