Livemesh Addons for Beaver Builder: Cross-site scripting
Livemesh Addons for Beaver Builder is affected by cross-site scripting. Exploitation requires at least subscriber-level access. Injected script can execute in the affected site's origin when the vulnerable output is viewed. The published affected range is <= 3.9.2.
- Component
- Livemesh Addons for Beaver Builder
- Plugin slug
addons-for-beaver-builder- Affected
- <= 3.9.2
- Safe version
> 3.9.2- Published
- May 27, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published May 27, 2026 and is one of 4 known issues for this plugin.
Update, patch or deactivate.
Update Livemesh Addons for Beaver Builder to a release after 3.9.2, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The Livemesh Addons for Beaver Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `labb_admin_ajax` AJAX action in all versions up to, and including, 3.9.2 due to missing authorization checks and insufficient input sanitization. The AJAX handler verifies a nonce but does not check user capabilities. This makes it possible for authenticated attackers with Subscriber-level access and above to modify plugin settings and inject malicious scripts that execute when administrators access the plugin settings page or when any user visits the frontend.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N