CVE-2025-46343

Summary

CVE-2025-46343 is a stored cross-site scripting (XSS) vulnerability affecting version 1.89.9 and below of the n8n workflow automation platform. The issue lies in the attachments view endpoint, which allows authenticated users to upload and access binary files without restriction on their MIME type. attackers can exploit this vulnerability by uploading a malicious HTML file with a manipulated MIME type. Upon accessing the binary data endpoint with the MIME type set to text/html, users' browsers will execute the contained JavaScript in their session context. This script can potentially initiate harmful actions, such as email address changes leading to account takeover. The vulnerability has been rectified in version 1.90.0.

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