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CVE-2026-96256— Gutenberg Essential Blocks <= 6.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'marker' Attribute

Quick assessment

Affected
wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns 插件在 6.4.5 及更早版本中存在存储型跨站脚本（Stored XSS）漏洞。该漏洞源于对 Google Map 块中“marker”属性的标题和内容值缺乏充分的输入净化和输出转义。这些值以 JSON 格式存储，随后在前端脚本的 InfoWindow 内容构建器中被解码并直接拼接到原始 HTML 中。这使得拥有贡献者（Contributor）级

CVSS 6.4 · Medium EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns ≤ 6.4.5 affected
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I. Basic Information for CVE-2026-96256

Vulnerability Information
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Vulnerability Title
Gutenberg Essential Blocks <= 6.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'marker' Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns 0 ~ 6.4.5 -

II. Public POCs for CVE-2026-96256

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III. Intelligence Information for CVE-2026-96256

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Patches & Fixes for CVE-2026-96256 (1)

Vendor Advisories for CVE-2026-96256 (1)

Other References for CVE-2026-96256 (4)

IV. Related Vulnerabilities

Same product: Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
Same vendor: wpdevteam
Same weakness: CWE-79

V. Comments for CVE-2026-96256

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