CVE-2024-1056 Cross-site scripting in FunnelKit Funnel Builder Pro

Medium 6.4 Published 29 Aug 2024 Updated 8 Apr 2026

Authenticated contributors can inject arbitrary scripts via iframe tags in posts, leading to stored XSS execution for other users.

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-2024-1056?

CVE-2024-1056 is a medium-severity cross-site scripting vulnerability in FunnelKit Funnel Builder Pro, published on 29 Aug 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The FunnelKit Funnel Builder Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'allow_iframe_tag_in_post' function which uses the 'wp_kses_allowed_html' filter to globally allow script and iframe tags in posts in all versions up to, and including, 3.4.5. This makes it possible for authenticated attackers, with contributor 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-2024-1056?

It affects 1 product.

Products include Funnelkit Funnel Builder.

How do I fix CVE-2024-1056?

No fix has been published for CVE-2024-1056 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-2024-1056 being exploited?

There is no known exploitation of CVE-2024-1056 in the wild and no public exploit code.

Sources

Also known as GHSA-qrcm-99p5-fwr8.