CVE-2026-18021 Beaver Builder Page Builder <= 2.10.3.1 - Unauthenticated Arbitrary Shortcode Execution
Unauthenticated attackers can execute arbitrary shortcodes in the Beaver Builder WordPress plugin due to improper validation, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18021?
CVE-2026-18021 is a medium-severity code injection vulnerability in beaverbuilder Beaver Builder Page Builder – Drag and Drop Website Builder, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The The Beaver Builder Page Builder – Drag and Drop Website Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 2.10.3.1. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes.
Weakness: CWE-94
Which versions are affected by CVE-2026-18021?
How do I fix CVE-2026-18021?
No fix has been published for CVE-2026-18021 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-18021 being exploited?
There is no known exploitation of CVE-2026-18021 in the wild and no public exploit code.
Sources
Also known as GHSA-p236-jmm4-v336.