CVE-2026-100147: FunnelKit <= 3.16.0.5 - Unauthenticated Stored Cross-Site Scripting via Order Fields (shipping/billing)
Published Oct 10, 2026
·Updated
The FunnelKit – Funnel Builder for WooCommerce Checkout plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'shippingfirstname' parameter in all versions up to, and including, 3.16.0.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected Software
1 affected component
FunnelKit Funnel Builder for WooCommerce Checkout<=3.16.0.5
Event History
Oct 10, 2026
CVE Published
via MITRE·07:41 AM
Data Sourced
via MITRE·07:41 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·08:17 AM
DescriptionSeverityWeakness
Frequently Asked Questions
1
Does exploitation require an attacker account or user interaction before injection?
No. The issue can be exploited by an unauthenticated attacker through the shipping_first_name order-field parameter.
2
Who is exposed after a malicious payload has been stored?
Any user who accesses a page containing the injected payload may have arbitrary web scripts executed in their browser.