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Vulnerabilities

Vulnerability · CVE-2026-100147

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Published Oct 9, 2026 · catalog updated Oct 9, 2026 · FunnelKit – Funnel Builder for WooCommerce Checkout

Patch now

CVE-2026-100147 is in the CISA known-exploited catalog. Confirm FunnelKit – Funnel Builder for WooCommerce Checkout against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
0.30%
Remediation
Remediation guidance
Affected products
stated FunnelKit – Funnel Builder for WooCommerce Checkout · vendor teamfunnelkit FunnelKit – Funnel Builder for WooCommerce Checkout

The FunnelKit – Funnel Builder for WooCommerce Checkout plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'shipping_first_name' 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated FunnelKit – Funnel Builder for WooCommerce Checkout<= 3.16.0
  • vendor teamfunnelkit FunnelKit – Funnel Builder for WooCommerce Checkoutversion unspecified

How to fix CVE-2026-100147

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-100147 is in the CISA known-exploited catalog. Confirm FunnelKit – Funnel Builder for WooCommerce Checkout against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with FunnelKit – Funnel Builder for WooCommerce Checkout <= 3.16.0. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 0.30%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 9, 2026 · VulnCheck KEV

    Detected

    The FunnelKit – Funnel Builder for WooCommerce Checkout plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'shipping_first_name' 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 acc

  2. Oct 9, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2026-100147

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-100147

    30-day exploitation probability 0.3%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2026-100147

    The FunnelKit – Funnel Builder for WooCommerce Checkout plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'shipping_first_name' parameter in all versions up to, and including, 3.16.0.5 due to insufficient input sanitization and output escaping. This makes

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.