CVE-2026-3897
Stored XSS in Livemesh Addons for Beaver Builder WordPress Plugin
Publication date: 2026-05-27
Last updated on: 2026-05-27
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 ID | Description |
|---|---|
| CWE-862 | The product does not perform an authorization check when an actor attempts to access a resource or perform an action. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.