---
id: CVE-2026-4327
title: >-
  The The Welcomizer plugin for WordPress is vulnerable to Remote Code Execution
  in all versions up to and including 2.8.1
summary: >-
  The The Welcomizer plugin for WordPress is vulnerable to Remote Code Execution
  in all versions up to and including 2.8.1. This is due to missing
  authorization checks on the twiz_ajax_callback AJAX action's 'savesection'
  handler combined …
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-94
vendor: sebwordpress
product: The Welcomizer
affected:
  - the_welcomizer <= 2.8.1
published: '2026-09-19'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T13:33:33.387'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-4327'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/the-welcomizer/tags/2.8.1/includes/twiz.menu.class.php#L265
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/the-welcomizer/tags/2.8.1/includes/twiz.menu.class.php#L507
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/the-welcomizer/tags/2.8.1/includes/twiz.menu.class.php#L580
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/the-welcomizer/tags/2.8.1/includes/twiz.output.class.php#L828
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/the-welcomizer/tags/2.8.1/twiz-ajax.php#L148
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/the-welcomizer/trunk/includes/twiz.menu.class.php#L265
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/the-welcomizer/trunk/includes/twiz.menu.class.php#L507
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/the-welcomizer/trunk/includes/twiz.menu.class.php#L580
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/the-welcomizer/trunk/includes/twiz.output.class.php#L828
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/the-welcomizer/trunk/twiz-ajax.php#L148
    label: security@wordfence.com
  - url: 'https://plugins.trac.wordpress.org/log/the-welcomizer/'
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/73fb7102-66ff-4309-a98f-bbbfd3ddbba6?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
epss: 0.00676
epssPercentile: 0.50186
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-19T13:23:25.810413Z'
ingestedAt: '2026-09-19T07:59:56.110Z'
---

## Overview

The The Welcomizer plugin for WordPress is vulnerable to Remote Code Execution in all versions up to and including 2.8.1. This is due to missing authorization checks on the twiz_ajax_callback AJAX action's 'savesection' handler combined with the use of eval() to execute user-supplied 'custom logic' code on the frontend. The AJAX handler at twiz-ajax.php verifies a nonce but performs no current_user_can() capability check for the ACTION_SAVE_SECTION case. Furthermore, the nonce is exposed to any authenticated user through the directly-accessible twiz-ajax.js.php file which loads WordPress and outputs the nonce. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary PHP code via the twiz_custom_logic POST parameter when saving a section with output choice 'twiz_logic_output'.

## Remediation

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