CVE-2026-35451

MediumCVSS 5.7/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.7/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-79

Affected software

No affected versions have been published.

Timeline

Published: Apr 21, 2026
Last modified: Jun 17, 2026
NVD status: Deferred

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