shohei.tanaka vulnerabilities and threats

Unauthenticated Broken Access Control in Japanized For WooCommerce <= 2.9.12 versions.

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.

The PAYGENT for WooCommerce plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 2.4.6. This is due to missing authorization checks on the paygent_check_webhook function combined with the paygent_permission_callback function unconditionally returning true on line 199. This makes it possible for unauthenticated attackers to manipulate payment callbacks and modify order statuses by sending forged payment notifications via the `/wp-json/paygent/v1/check/` endpoint.

The Japanized for WooCommerce plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `order` REST API endpoint in all versions up to, and including, 2.7.17. This makes it possible for unauthenticated attackers to mark any WooCommerce order as processed/completed.