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CVE-2026-35451— Twenty: Stored XSS via BlockNote FileBlock

CVSS 5.7 · Medium EPSS 0.04% · P11
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I. Basic Information for CVE-2026-35451

Vulnerability Information
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Vulnerability Title
Twenty: Stored XSS via BlockNote FileBlock
Source: NVD (National Vulnerability Database)
Vulnerability Description
Twenty is an open source CRM. Prior to 1.20.6, a Stored Cross-Site Scripting (XSS) vulnerability exists in the BlockNote editor component. Due to a lack of protocol validation in the FileBlock component and insufficient server-side inspection of block content, an attacker can inject a javascript: URI into the url property of a file block. This allows the execution of arbitrary JavaScript when a user clicks on the malicious file attachment. This vulnerability is fixed in 1.20.6.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/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
Twenty 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Twenty是Twenty开源的一个 CRM 平台。 Twenty 1.20.6之前版本存在跨站脚本漏洞，该漏洞源于BlockNote编辑器组件缺乏协议验证和服务器端检查不足，可能导致存储型跨站脚本攻击。
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

VendorProductAffected VersionsCPESubscribe
twentyhqtwenty < 1.20.6 -

II. Public POCs for CVE-2026-35451

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III. Intelligence Information for CVE-2026-35451

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IV. Related Vulnerabilities

Same product: twenty
Same vendor: twentyhq
Same weakness: CWE-79

V. Comments for CVE-2026-35451

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