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CVE-2026-104762— Kadence Blocks <= 3.7.12 - Authenticated (Author+) Stored Cross-Site Scripting via Block Font Family Attribute

Quick assessment

Affected
stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor
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 Kadence Blocks — Gutenberg 编辑器页面构建器工具包插件在所有 3.7.12 及以下版本中存在存储型跨站脚本（XSS）漏洞，该漏洞源于区块“字体家族”属性缺乏足够的输入清理和输出转义。这使得拥有作者级或以上权限的认证攻击者能够在网页中注入任意 Web 脚本，当其他用户访问被注入脚本的页面时，这些脚本将会被执行。 需要注意的是，此编码绕过机制仅在启用“本地加载 Google 字体”站点选项（即 设置为启用状态）时才会触发，而该选项并非默认配置。

CVSS 6.4 · Medium EPSS 0.22% · P11

Affected Version Matrix 1

VendorProduct Version RangeStatus
stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor ≤ 3.7.12 affected
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I. Basic Information for CVE-2026-104762

Vulnerability Information
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Vulnerability Title
Kadence Blocks <= 3.7.12 - Authenticated (Author+) Stored Cross-Site Scripting via Block Font Family Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Block Font Family Attribute in all versions up to, and including, 3.7.12 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This encoding bypass is only triggered when the "Load Google Fonts Locally" site option (kadence_blocks_font_settings['load_fonts_local']) is enabled, which is not the default configuration.
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
stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor 0 ~ 3.7.12 -

II. Public POCs for CVE-2026-104762

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III. Intelligence Information for CVE-2026-104762

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Patches & Fixes for CVE-2026-104762 (2)

News Coverage for CVE-2026-104762 (1)

IV. Related Vulnerabilities

Same product: Kadence Blocks — Page Builder Toolkit for Gutenberg Editor
Same vendor: stellarwp
Same weakness: CWE-79

V. Comments for CVE-2026-104762

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