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Privilege Escalation Affecting n8n package, versions <0.216.1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 0.08% (33rd percentile)
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NVD
8.8 high

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  • Snyk ID SNYK-JS-N8N-5518105
  • published 11 May 2023
  • disclosed 11 May 2023
  • credit Antonie Cervoise, JÉRÔME MAMPIANINAZAKASON
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Introduced: 11 May 2023

CVE-2023-27563 Open this link in a new tab
CWE-264 Open this link in a new tab

How to fix?

Upgrade n8n to version 0.216.1 or higher.

Overview

n8n is a n8n Workflow Automation Tool

Affected versions of this package are vulnerable to Privilege Escalation when the updateCurrentUser method of the MeController class does not perform sufficient checks before merging a user object with an object controlled by the user. Exploiting this vulnerability allows an authenticated user to add any attribute in the object sent in the HTTP request body, so it would be merged in the user object without validation.