CVE-2025-46343

n8n Vulnerable to Stored XSS through Attachments View Endpoint

Description

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.

Category

5.0
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Vendor Advisory github.com
Affected: n8n-io n8n
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2025-46343?
CVE-2025-46343 has been scored as a medium severity vulnerability.
How to fix CVE-2025-46343?
To fix CVE-2025-46343, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-46343 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-46343 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-46343?
CVE-2025-46343 affects n8n-io n8n.
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