CVE-2024-3340 Cross-site scripting in Colibri Page Builder

Medium 5.4 Published 2 May 2024 Updated 8 Apr 2026

Authenticated attackers can inject arbitrary web scripts via a shortcode, leading to script execution when users view the page.

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-2024-3340?

CVE-2024-3340 is a medium-severity cross-site scripting vulnerability in extendthemes Colibri Page Builder, published on 2 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Colibri Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'colibri-gallery-slideshow' shortcode in all versions up to, and including, 1.0.272 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Weakness: CWE-79

Which versions are affected by CVE-2024-3340?

It affects 1 product.

Products include Extendthemes Colibri Page Builder.

How do I fix CVE-2024-3340?

No fix has been published for CVE-2024-3340 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-2024-3340 being exploited?

There is no known exploitation of CVE-2024-3340 in the wild and no public exploit code.

Sources

Also known as GHSA-r45f-4gg8-w8cc.