---
id: CVE-2026-96256
title: >-
  The Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
  plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the
  Google Map block's 'marker' attribute in versions up to, and including, 6.4.5
  This is…
summary: >-
  The Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
  plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the
  Google Map block's 'marker' attribute in versions up to, and including, 6.4.5
  This is…
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
vendor: wpdevteam
product: Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
affected:
  - >-
    gutenberg_essential_blocks_page_builder_for_gutenberg_blocks_patterns <=
    6.4.5
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T10:17:17.613'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96256'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.3.0/assets/blocks/google-map/frontend.js#L1
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.3.0/includes/Blocks/GoogleMap.php#L82
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.3.0/src/blocks/google-map/src/save.js#L35
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.4.5/assets/blocks/google-map/frontend.js#L1
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.4.5/includes/Blocks/GoogleMap.php#L82
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.4.5/src/blocks/google-map/src/save.js#L35
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3715353/essential-blocks/trunk/assets/blocks/google-map/frontend.js
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&new=3715353%40essential-blocks%2Ftags%2F6.4.6&old=3706819%40essential-blocks%2Ftags%2F6.4.5
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/606f25d9-f8c7-416a-8bb8-0cc57901ff5a?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-01T09:41:14.164Z'
---

## Overview

The Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Google Map block's 'marker' attribute in versions up to, and including, 6.4.5 This is due to insufficient input sanitization and output escaping on marker title/content values, which are stored as JSON and then decoded and concatenated directly into raw HTML by the frontend script's InfoWindow content builder. 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.