---
id: CVE-2026-18435
title: >-
  The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for
  WordPress is vulnerable to Stored Cross-Site Scripting via 'toggleIcon' Block
  Attribute in all versions up to, and including, 3.7.8 due to insufficient
  input sanit…
summary: >-
  The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for
  WordPress is vulnerable to Stored Cross-Site Scripting via 'toggleIcon' Block
  Attribute in all versions up to, and including, 3.7.8 due to insufficient
  input sanit…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2026-08-01'
updated: '2026-08-01'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18435'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.8/includes/blocks/class-kadence-blocks-table-of-contents-block.php#L293
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.8/includes/class-kadence-blocks-table-of-contents.php#L936
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3624906%40kadence-blocks&new=3624906%40kadence-blocks
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/5f346cc7-92ad-4f76-a71c-864c22ed56b5?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00331
epssPercentile: 0.23548
ingestedAt: '2026-08-02T05:17:48.662Z'
---

## Overview

The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'toggleIcon' Block Attribute in all versions up to, and including, 3.7.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.