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CVE-2026-6378— Maxi Blocks <= 2.1.9 - Authenticated (Author+) Stored Cross-Site Scripting via Style Card REST API

CVSS 6.4 · Medium EPSS 0.06% · P20
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I. Basic Information for CVE-2026-6378

Vulnerability Information
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Vulnerability Title
Maxi Blocks <= 2.1.9 - Authenticated (Author+) Stored Cross-Site Scripting via Style Card REST API
Source: NVD (National Vulnerability Database)
Vulnerability Description
The Maxi Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `/wp-json/maxi-blocks/v1.0/style-card` REST API endpoint in all versions up to, and including, 2.1.9 due to insufficient input sanitization and output escaping of the `sc_styles` parameter. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts that execute on every page where the plugin's style card styles are loaded, including across the entire WordPress admin panel.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin Maxi Blocks 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Maxi Blocks 2.1.9及之前版本存在跨站脚本漏洞，该漏洞源于对sc_styles参数输入清理和输出转义不足，可能导致经过身份验证的攻击者注入任意Web脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
ckp267MaxiBlocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites 0 ~ 2.1.9 -

II. Public POCs for CVE-2026-6378

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III. Intelligence Information for CVE-2026-6378

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IV. Related Vulnerabilities

Same product: MaxiBlocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites
Same vendor: ckp267
Same weakness: CWE-79

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