What the vulnerability does
01Description
The WPBakery Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the vc_custom_heading shortcode in all versions up to, and including, 8.6.1. This is due to insufficient restriction of allowed HTML tags and improper sanitization of user-supplied attributes in the font_container parameter. This makes it possible for authenticated attackers with contributor-level access or higher to inject arbitrary web scripts in posts that will execute whenever a user accesses an injected page via the vc_custom_heading shortcode with malicious tag and text attributes granted they have access to use WPBakery shortcodes.
Explanation of Vulnerability in Simple Terms
02Summary
WPBakery Page Builder versions up to 8.6.1 contain a cross-site scripting vulnerability that allows authenticated users with low privileges to inject malicious scripts. The vulnerability has scope impact, meaning injected content can affect other users and site functionality. An attacker needs a valid user account to exploit this issue.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers and affect site functionality.
Potential impact on your site
04Site Impact
Authenticated attackers can deface pages, steal session data, or redirect visitors to malicious sites.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account on the site; no user interaction required.
Key dates
06Disclosure timeline
October 15, 2025
CVE published
April 8, 2026
Record updated
