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

> Unauthenticated attackers can inject malicious JavaScript into checkout pages by exploiting missing authorization in the External Scripts setting.

- **Severity:** High 8.7 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 May 2026
- **Updated:** 28 Jul 2026
- **Also known as:** GHSA-cffp-87j8-rff2

## What is CVE-2026-47100?

CVE-2026-47100 is a high-severity missing authorization vulnerability in FunnelKit Funnel Builder for WooCommerce Checkout, published on 19 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### 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.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-47100?


## How do I fix CVE-2026-47100?

No fix has been published for CVE-2026-47100 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-47100 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-47100 exists.

Public exploit code:

- https://github.com/rootdirective-sec/CVE-2026-47100-Analysis-Lab (github_poc): https://github.com/rootdirective-sec/CVE-2026-47100-Analysis-Lab

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-47100 and fix it if it is affected.

What it is: CVE-2026-47100 is a high-severity missing authorization vulnerability in FunnelKit Funnel Builder for WooCommerce Checkout, published on 19 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-47100 exists.

Affected product: FunnelKit Funnel Builder for WooCommerce Checkout. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-47100/ (Markdown: https://insights.sbomify.com/CVE-2026-47100/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-47100
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-47100
- OSV: https://osv.dev/vulnerability/CVE-2026-47100

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-47100/
Summaries are generated and may contain mistakes; the official description above is the record.