CVE-2026-3897 Cross-site scripting in Livemesh Addons for Beaver Builder
Authenticated attackers can inject malicious scripts into plugin settings, leading to code execution and potential privilege escalation when administrators view the settings.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3897?
CVE-2026-3897 is a medium-severity cross-site scripting vulnerability in Livemesh Addons for Beaver Builder, published on 27 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-3897?
How do I fix CVE-2026-3897?
No fix has been published for CVE-2026-3897 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-3897 being exploited?
There is no known exploitation of CVE-2026-3897 in the wild and no public exploit code.
Sources
Also known as GHSA-pwmq-vp5f-f6p3.