What the vulnerability does
01Description
The Meta Box – WordPress Custom Fields Framework plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom post meta values displayed through the plugin's shortcode in all versions up to, and including, 5.9.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
Meta Box versions up to 5.9.2 contain a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in the browsers of other users, including administrators. The vulnerability affects the entire site scope due to how Meta Box processes and stores user input without proper sanitization.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers when they view affected pages.
Potential impact on your site
04Site Impact
Any authenticated user can compromise admin accounts or steal sensitive data from other users viewing the site.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege authenticated account on the site.
Key dates
06Disclosure timeline
February 5, 2024
CVE published
April 8, 2026
Record updated
