Vulnerability · Published May 19, 2026 · Assigned by VulnCheck
CVE-2026-47100Funnel Builder for WooCommerce Checkout < 3.15.0.3 Missing Authorization via AJAX
High 7.5
In plain English
A high-severity missing authorization in Funnel Builder for WooCommerce Checkout from FunnelKit. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
Funnel Builder for WooCommerce Checkout prior to 3.15.0.3 contains a missing authorization vulnerability in the public checkout endpoint that allows unauthenticated attackers to invoke internal methods and write arbitrary data to the plugin's External Scripts global setting. Attackers can inject malicious JavaScript through the External Scripts setting that executes in the browsers of all checkout page visitors.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| FunnelKit | Funnel Builder for WooCommerce Checkout | 0 – before 3.15.0.3 |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
References
- https://sansec.io/research/funnelkit-woocommerce-vulnerability-exploited technical-description
- https://plugins.trac.wordpress.org/changeset/3530797/funnel-builder/tags/3.15.0.3/modules/checkouts/includes/class-wfacp-ajax-controller.php patch
- https://www.vulncheck.com/advisories/funnel-builder-for-woocommerce-checkout-missing-authorization-via-ajax third-party-advisory