CVE Catalog

CVE-2026-4327

HighCVSS 8.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Elevated risk
0.70%

51th percentile - higher than 51% of all known CVEs

Summary

The Welcomizer plugin for WordPress in all versions up to and including 2.8.1 is vulnerable to Remote Code Execution (RCE). Missing authorization checks on the 'twiz_ajax_callback' AJAX action's 'savesection' handler combined with the use of eval() to execute user-supplied code allows authenticated attackers with Subscriber-level access and above to inject arbitrary PHP code.

Risk Assessment

An authenticated low-privileged attacker can execute arbitrary PHP code on the server, leading to full site takeover. This may result in data theft, backdoor installation, and using the server for further attacks.

Recommendation

Immediately update The Welcomizer plugin to a version newer than 2.8.1 or disable it if no fix is available. Review server logs and files for signs of injected code and rotate administrative passwords.

Related vulnerabilities

Original NVD description (English source)

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'.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS