Reported vulnerability
The Welcomizer <= 2.8.1 - Missing Authorization to Authenticated (Subscriber+) Remote Code Execution via 'twiz_custom_logic' Parameter
Published 18 Sept 2026
Updated 19 Sept 2026
CVE-2026-4327
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Does this affect my version?
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Wordfence advisory
high · CVSS 8.8The 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'.
Severity vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The Welcomizer
- Software
- plugin · the-welcomizer
- Affected versions
- Start version unspecified, through 2.8.1
- Fix availability
- Fix available
- Fixed versions
- 999.0
Recommended action
Update to version 999.0, or a newer patched version
Further references (1)
Data sources and licences
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Read licence termsSource: Wordfence
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Get help with this issueQuestions about this vulnerability
Which versions of The Welcomizer are affected?
Wordfence lists these affected versions: Start version unspecified, through 2.8.1. Use the version checker above to compare your installed release with this report.
Is a fix available for The Welcomizer?
Wordfence reports a fix for this issue in The Welcomizer. It lists these fixed versions: 999.0. Back up your website and test the recommended update before applying it to your live site.
Where can I find my installed plugin version?
In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.
Does an affected version mean my website has been hacked?
An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.