CVE-2026-57816: FunnelKit Funnel Builder Reflected XSS

CVE-2026-57816 · Severity: high · CVSS 7.1 · Published 2026-07-13

Funnel Builder by FunnelKit is a WordPress plugin used to create sales funnels and marketing pages. A security vulnerability in this plugin allows attackers to inject malicious scripts into the website, which are then executed in the browser of other users. If a site administrator or customer clicks a specially crafted link, the attacker could potentially steal session information, redirect users to malicious sites, or perform unauthorized actions on their behalf.

Technologies: FunnelKit Funnel Builder. Vendors: FunnelKit.

Quick answers

Is CVE-2026-57816 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-57816 being exploited in the wild.
How severe is CVE-2026-57816?
High severity, with a CVSS score of 7.1, published 13 July 2026.
Which products and versions are affected?
FunnelKit Funnel Builder <= 3.15.0.8.
Is there a fix for CVE-2026-57816?
A patch was published on 2026-07-10: Version 3.15.0.9 released to address the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-57816 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-57816?
Check whether you run FunnelKit Funnel Builder at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The Funnel Builder by FunnelKit plugin for WordPress (versions up to and including 3.15.0.8) is vulnerable to Reflected Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on web page generation. An unauthenticated remote attacker can exploit this by tricking a user into clicking a crafted link or visiting a malicious page. The vulnerability is classified under CWE-79 and has a CVSS 3.1 base score of 7.1, as it requires user interaction but can lead to a full compromise of the user's browser session within the application's context. The issue is resolved in version 3.15.0.9.

Affected products

  • FunnelKit Funnel Builder by FunnelKit <= 3.15.0.8

Timeline

  • 2026-06-25: disclosed: Reported by daroo to Patchstack
  • 2026-07-10: advisory: Patchstack advisory published
  • 2026-07-13: advisory: NVD record published
  • 2026-07-10: patched: Version 3.15.0.9 released to address the issue

References

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