7.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2023-27564

CVE-2023-27564: n8n Information Disclosure vulnerability

The n8n package prior to 0.216.1 for Node.js allows Information Disclosure.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2023-27564

CVE-2023-27564:

7.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
n8n	npm	< 0.216.1	0.216.1

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stemmed from an overly permissive authentication bypass in the setupAuthMiddlewares function. The pre-patch code explicitly excluded authentication for URLs containing '.svg' and other static asset paths via direct string matching (req.url.includes('.svg')). This allowed attackers to access protected resources by appending '.svg' to endpoints or accessing static assets improperly. The patch replaced this insecure explicit bypass with a controlled glob pattern matching validated static assets from a known directory (EDITOR_UI_DIST_DIR), ensuring only legitimate static files bypass authentication. The CWE-668 (Exposure of Resource to Wrong Sphere) directly maps to this authentication bypass mechanism.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

Vulnerability Intelligence
Miggo AI

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WAF Protection Rules

WAF Rule

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Reasoning

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