TI-2025-29084 Aliases CVE-2025-46343 GHSA-c8hm-hr8h-5xjw

n8n Vulnerable to Stored XSS through Attachments View Endpoint

LOW 24CWE-79Published 2025-04-29 · Updated 2025-04-29

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

n8n is a workflow automation platform. Prior to version 1.90.0, n8n is vulnerable to stored cross-site scripting (XSS) through the attachments view endpoint. n8n workflows can store and serve binary files, which are accessible to authenticated users. However, there is no restriction on the MIME type of uploaded files, and the MIME type could be controlled via a GET parameter. This allows the server to respond with any MIME type, potentially enabling malicious content to be interpreted and executed by the browser. An authenticated attacker with member-level permissions could exploit this by uploading a crafted HTML file containing malicious JavaScript. When another user visits the binary data endpoint with the MIME type set to text/html, the script executes in the context of the user’s session. This script could send a request to change the user’s email address in their account settings, effectively enabling account takeover. This issue has been patched in version 1.90.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00269 19th percentileScored 2026-11-07

Fix Fixed n8n (n8n-io): 1.90.0n8n (npm): 1.90.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
n8n	n8n	before 1.90.0	1.90.0	Patch available	CNA
—	n8n (npm)	before 1.90.0	1.90.0	Patch available	GHSA-c8hm-hr8h-5xjw

n8n Vendorn8n Affected before 1.90.0 Fixed in 1.90.0 Patch available CNA
n8n (npm) Vendor— Affected before 1.90.0 Fixed in 1.90.0 Patch available GHSA-c8hm-hr8h-5xjw

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:n8n:n8n::::::node.js::*	before 1.90.0	Vulnerable	n8n

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* Versions before 1.90.0 Vulnerable ·n8n

Remediation

Fix · CNA n8n (n8n-io) Fixed in 1.90.0
Fix · GHSA-c8hm-hr8h-5xjw n8n (npm) Fixed in 1.90.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-46343
2026-10-03 Alias added: GHSA-c8hm-hr8h-5xjw

References

Patch 3

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2025-46343

Other 2

TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 3.1CRITICAL 10.0
TI-2026-17560 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling CVSS 3.1CRITICAL 10.0
TI-2026-01167 Authenticated users can bypass the Expression sandbox mechanism to achieve full remote… CVSS 3.1CRITICAL 9.9
TI-2026-00644 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. CVSS 3.1CRITICAL 9.9
TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8
TI-2023-12275 The n8n package 0.218.0 for Node.js allows Escalation of Privileges. CVSS 3.1HIGH 8.8

See all 178 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences