---
id: "CVE-2026-39742"
kind: "vulnerability"
aliases: ["CVE-2026-39742"]
title: "Kadence Blocks WordPress plugin: stored XSS via page content through 3.8.0.2"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["gutenberg", "kadence-blocks", "package", "wordpress"]
not_affected_if: ["plugin-not-installed", "trusted-editors-only"]
published_at: "2026-10-29T15:17:22+00:00"
first_seen_at: "2026-10-29T15:25:40+00:00"
updated_at: "2026-10-29T15:26:35+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39742", "first_seen_at": "2026-10-29T15:25:40+00:00"}]
---

# Kadence Blocks WordPress plugin: stored XSS via page content through 3.8.0.2

Gutenberg Blocks by Kadence Blocks, a WordPress plugin from Liquid Web and StellarWP, fails to neutralize input when generating pages, allowing stored cross-site scripting. An attacker who can get script saved into a page can run it in the browsers of visitors or editors.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed version of the Gutenberg Blocks by Kadence Blocks plugin (kadence-blocks) in the WordPress plugins screen or `wp plugin get kadence-blocks --field=version`
- Confirm whether the plugin is active on the site

## Fix

- Gutenberg Blocks by Kadence Blocks (kadence-blocks): move to a version later than `3.8.0.2`; the source does not name the fixed version

## Timeline

- 2026-10-29T15:25:40+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-39742

## From the sources

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Liquid Web / StellarWP Gutenberg Blocks by Kadence Blocks kadence-blocks allows Stored XSS.This issue affects Gutenberg Blocks by Kadence Blocks: from n/a through 3.8.0.2.

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