CVE-2026-18843 Cross-site scripting in Beaver Builder Plugin (Starter Version)
Unauthenticated attackers can inject arbitrary scripts via the no_results_message parameter, requiring user interaction to execute.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-18843?
CVE-2026-18843 is a medium-severity cross-site scripting vulnerability in The Beaver Builder Team Beaver Builder Plugin (Starter Version), published on 5 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Beaver Builder Plugin (Starter Version) plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'no_results_message' node_preview Parameter in all versions up to, and including, 2.11.0.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
Weakness: CWE-79
Which versions are affected by CVE-2026-18843?
How do I fix CVE-2026-18843?
No fix has been published for CVE-2026-18843 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-2026-18843 being exploited?
There is no known exploitation of CVE-2026-18843 in the wild and no public exploit code.
Sources
Also known as GHSA-grcg-2g4r-q84p.