What the vulnerability does
01Description
The WPBakery Page Builder Addons by Livemesh plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `[lvca_carousel]` and `[lvca_posts_carousel]` shortcode attributes in all versions up to, and including, 3.9.4 due to insufficient input sanitization and output escaping. Specifically, shortcode attributes are encoded with `wp_json_encode()` and output into single-quoted `data-settings` HTML attributes without using `esc_attr()`, allowing attackers to break out of the attribute by injecting single quotes. 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
WPBakery Page Builder Addons by Livemesh versions 3.9.4 and earlier 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 site visitors, potentially compromising their sessions or stealing sensitive data. The vulnerability affects the entire site scope due to how the addon processes and stores user input.
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
Visitors and admins may have their sessions hijacked or credentials stolen via injected scripts on your site.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account (e.g., contributor or subscriber) on the WordPress site.
Key dates
06Disclosure timeline
May 27, 2026
CVE published
May 27, 2026
Record updated
