SB20260728111 - Cross-site scripting in Twenty

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Main Vulnerability Database SB20260728111

SB20260728111 - Cross-site scripting in Twenty

Published: July 28, 2026

Security Bulletin ID SB20260728111
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Cross-site scripting (CVE-ID: CVE-2026-35451)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]


The vulnerability allows a remote user to execute arbitrary JavaScript in a victim's browser.

The vulnerability exists due to cross-site scripting in the BlockNote FileBlock component when rendering crafted file block content. A remote user can inject a javascript: URI into the url property of a file block to execute arbitrary JavaScript in a victim's browser.

User interaction is required to click on the malicious file attachment.


Remediation

Install update from vendor's website.

References