---
id: CVE-2026-18467
title: >-
  The Paytium: Mollie payment forms & donations plugin for WordPress is
  vulnerable to Privilege Escalation in all versions up to, and including, 5.0.3
summary: >-
  The Paytium: Mollie payment forms & donations plugin for WordPress is
  vulnerable to Privilege Escalation in all versions up to, and including,
  5.0.3. The 5.0.3 patch introduced a wp_hash()/hash_equals() signature gate on
  the pt-paytium-u…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-269
vendor: paytiumsupport
product: 'Paytium: Mollie payment forms & donations'
affected:
  - paytium_mollie_payment_forms_donations <= 5.0.3
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T16:17:07.393'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18467'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/paytium/tags/5.0.3/includes/payment-functions.php#L113
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/paytium/tags/5.0.3/includes/process-payment-functions.php#L1103
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/paytium/tags/5.0.3/includes/process-payment-functions.php#L21
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/paytium/tags/5.0.3/includes/process-payment-functions.php#L696
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/paytium/tags/5.0.3/includes/user-data-functions.php#L214
    label: security@wordfence.com
  - url: 'https://plugins.trac.wordpress.org/changeset/3678569/paytium'
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/caa1a42a-6bb2-42c8-aae7-fb1c895573a8?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T01:36:07.410Z'
epss: 0.00392
epssPercentile: 0.30636
---

## Overview

The Paytium: Mollie payment forms & donations plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 5.0.3. The 5.0.3 patch introduced a wp_hash()/hash_equals() signature gate on the pt-paytium-user-data field, but left a second filter — pt_cf_checkout_meta(), registered on the pt_meta_values hook after the signed builder — that copies every $_POST['pt_form_field'][*] key verbatim into the payment meta array without any signature verification; this allows the pt-user-role value it copies to overwrite the signed path's output, after which paytium_user_data_processing() reads the persisted _pt-user-role post meta and passes it directly as the role argument to wp_insert_user(). This makes it possible for unauthenticated attackers to register a new WordPress account with the administrator role and fully take over the site. Exploitation requires submitting a payment through a publicly-exposed [paytium] shortcode form and completing the resulting payment flow, after which the attacker can seize the new administrator account via the standard lost-password flow on their supplied email address.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.