How severe is CVE-2026-12432?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2026-12432 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Themeisle Stripe Payment Forms By Wp Full Pay – Accept Credit Card Payments, Donations & Subscriptions

CVE-2026-12432

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.

Vulnerability class: Broken Access Control

Published 2026-06-27 · last modified 2026-06-29.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Themeisle Stripe Payment Forms By Wp Full Pay – Accept Credit Card Payments, Donations & Subscriptions — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

Public proof-of-concept exploits

Polosss/By-Poloss..-..CVE-2026-12432-PoC

References

Frequently asked questions

What is CVE-2026-12432?: CVE-2026-12432 is a medium-severity vulnerability in Themeisle Stripe Payment Forms By Wp Full Pay – Accept Credit Card Payments, Donations & Subscriptions, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-06-27.
How severe is CVE-2026-12432?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2026-12432 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.