themeisle Stripe Payment Forms by WP Full Pay Plugin up to 8.4.3 on WordPress Stripe.js wpfs_update_failed_payment_status db authorization

Summaryinfo

A vulnerability identified as critical has been detected in themeisle Stripe Payment Forms by WP Full Pay Plugin up to 8.4.3 on WordPress. Impacted is the function wpfs_update_failed_payment_status of the file Stripe.js. This manipulation of the argument db causes authorization. This vulnerability is tracked as CVE-2026-12432. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in themeisle Stripe Payment Forms by WP Full Pay Plugin up to 8.4.3 on WordPress and classified as critical. Affected by this vulnerability is the function wpfs_update_failed_payment_status of the file Stripe.js. The manipulation of the argument db with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The WP Full Stripe Free plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 8.4.3 via the wpfs_update_failed_payment_status AJAX action. The handler is registered through both wp_ajax_ and wp_ajax_nopriv_ hooks and the underlying update_failed_payment_status() function performs no capability check, no nonce verification, and no logged-in check before calling $this->db->updatePaymentByEventId() with attacker-controlled POST parameters. This makes it possible for unauthenticated attackers who can obtain a valid Stripe Payment Intent ID for the target site (Payment Intent IDs are exposed to the customer browser during normal Stripe.js checkout flows) to manipulate payment records in the site's database, marking previously successful payments as failed and overwriting failure codes and messages with attacker-supplied values.

The weakness was disclosed by Netwurm. It is possible to read the advisory at wordfence.com. This vulnerability is known as CVE-2026-12432 since 06/16/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 8.4.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-39957). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• themeisle

Name

• Stripe Payment Forms by WP Full Pay Plugin

Version

• 8.4.0
• 8.4.1
• 8.4.2
• 8.4.3

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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