CVE-2026-3897
Deferred Deferred - Pending Action

Stored XSS in Livemesh Addons for Beaver Builder WordPress Plugin

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: Wordfence

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.

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Meta Information

Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-07-06
AI Q&A
2026-05-27
EPSS Evaluated
2026-07-05
NVD
CVE-2026-3897
EUVD
EUVD-2026-32101

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
livemesh beaver_builder_addons to 3.9.2 (inc)
livemesh addons_for_beaver_builder to 3.9.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

The Livemesh Addons for Beaver Builder plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in the `labb_admin_ajax` AJAX action in all versions up to and including 3.9.2.

This vulnerability exists because the AJAX handler verifies a nonce but does not check user capabilities and lacks sufficient input sanitization.

As a result, authenticated attackers with Subscriber-level access or higher can modify plugin settings and inject malicious scripts.

These malicious scripts execute when administrators access the plugin settings page or when any user visits the frontend.

Impact Analysis

This vulnerability allows attackers with low-level authenticated access (Subscriber or above) to inject malicious scripts into the plugin settings.

These scripts can execute in the context of administrators or any users visiting the frontend, potentially leading to unauthorized actions or data theft.

Because the vulnerability involves Stored Cross-Site Scripting, it can be used to hijack sessions, steal credentials, or perform actions on behalf of administrators.

Compliance Impact

The vulnerability allows authenticated attackers with Subscriber-level access and above to inject malicious scripts that execute when administrators or users access certain pages. This could lead to unauthorized modification of plugin settings and potential exposure of sensitive information.

Such unauthorized access and potential data exposure could impact compliance with standards like GDPR and HIPAA, which require protection of personal data and secure system configurations to prevent unauthorized access and data breaches.

However, the provided information does not explicitly detail the direct impact on compliance with these regulations.

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