n8n before 1.123.64, 2.x before 2.29.8, and before 2.30.1 contains a DOM-based cross-site scripting vulnerability in the HTML preview, which renders execution output into an iframe srcdoc without the sandbox attribute. A sanitizer bypass allows injected script to execute same-origin as the editor. When a victim opens the preview, the script can call authenticated APIs using the victim's session.
An account with global:member privileges can exploit the issue.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
Active
User action required
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 6
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
N8n N8n
cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*
|
— |
1.123.64
|
|
N8n N8n
cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*
|
— |
1.123.64
|
|
N8n N8n
cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*
|
2.0.0
|
2.29.8
|
|
N8n N8n
cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*
|
2.0.0
|
2.29.8
|
|
N8n N8n
cpe:2.3:a:n8n:n8n:2.30.0:*:*:*:community:node.js:*:*
|
— | — |
|
N8n N8n
cpe:2.3:a:n8n:n8n:2.30.0:*:*:*:enterprise:node.js:*:*
|
— | — |