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CVE-2026-2030: WPBakery Page Builder Addons by Livemesh <= 3.9.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-06-17
• Weakness: CWE-79

Description

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.

Affected products

• livemesh WPBakery Page Builder Addons by Livemesh: through 3.9.4

References

• https://plugins.trac.wordpress.org/browser/addons-for-visual-composer/tags/3.9.4/includes/addons/carousel/class-lvca-carousel.php#L55
• https://plugins.trac.wordpress.org/browser/addons-for-visual-composer/tags/3.9.4/includes/addons/posts-carousel/class-lvca-posts-carousel.php#L113
• https://www.wordfence.com/threat-intel/vulnerabilities/id/ac1493dc-a90a-4427-a631-af5da65e1d6c?source=cve

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