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CVE-2026-5820— Zypento Blocks <= 1.0.6 - Authenticated (Author+) Stored Cross-Site Scripting via Table of Contents Block

Quick assessment

Affected
sproutient Zypento Blocks
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 Zypento Blocks 1.0.6及之前版本存在跨站脚本漏洞，该漏洞源于前端TOC渲染脚本通过innerText读取标题文本并使用innerHTML插入页面时未进行适当清理，可能导致具有作者及以上权限的认证攻击

CVSS 6.4 · Medium EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-5820

Vulnerability Information
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Vulnerability Title
Zypento Blocks <= 1.0.6 - Authenticated (Author+) Stored Cross-Site Scripting via Table of Contents Block
Source: CVE Program / CVE List V5
Vulnerability Description
The Zypento Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Table of Contents block in all versions up to, and including, 1.0.6. This is due to the front-end TOC rendering script reading heading text via `innerText` and inserting it into the page using `innerHTML` without proper sanitization. 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.
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
Vulnerability Title
WordPress plugin Zypento 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 Zypento Blocks 1.0.6及之前版本存在跨站脚本漏洞，该漏洞源于前端TOC渲染脚本通过innerText读取标题文本并使用innerHTML插入页面时未进行适当清理，可能导致具有作者及以上权限的认证攻击
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

Vendor Product Affected Versions CPE Subscribe
sproutient Zypento Blocks 0 ~ 1.06 -

II. Public POCs for CVE-2026-5820

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III. Intelligence Information for CVE-2026-5820

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IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2026-5820

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