Security Advisory

CVE-2026-35451

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-04-21 16:22:30

Last updated 2026-04-21 16:56:02

Assigner GitHub_M

CVSS score 5.7

State PUBLISHED

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.

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