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Advisories

n8n - Stored Cross-Site Scripting in Chat Trigger Node Custom CSS Field

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severity
medium
date
Affecting

  • n8n >= 0, < 1.123.27

  • n8n >= 2.0.0-rc.0, < 2.13.3

  • n8n >= 2.14.0, < 2.14.1

  • n8n >= 0, < 2.14.1

  • n8n >= 0, < 2.13.3

CWE
  • CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS
5.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Credit
JorianWoltjer
Description
n8n contains a stored cross-site scripting vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. Affected releases are those before 1.123.27, the 2.0.0 through 2.13.2 line, and 2.14.0 (fixed in 1.123.27, 2.13.3, and 2.14.1). An authenticated user with permission to create or modify workflows can inject JavaScript that bypasses sanitization, resulting in stored XSS against any user who visits the public chat page.

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