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[R3] Nessus Web UI Scanned Content Stored XSS



The Nessus scanner's web-based user interface (Web UI) was vulnerable to a stored cross-site scripting (XSS) attack. The issue was due to a security control being briefly removed due to a regression error. During this 48 hour window, one new build of the Web UI was released leading to the ability to inject arbitrary script code. This could be done by setting up a malicious web server that returned a crafted host header containing JavaScript. When Nessus scanned the web server, the input would be passed as-is and render when viewing a report.


Tenable has released version 2.3.4 Build #85 of the Nessus Web UI that fixes this issue. Nessus users automatically received this fix as part of the plugin feed daily update.

This page contains information regarding security vulnerabilities that may impact Tenable's products. This may include issues specific to our software, or due to the use of third-party libraries within our software. Tenable strongly encourages users to ensure that they upgrade or apply relevant patches in a timely manner.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]