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[R3] Nessus Web UI Scanned Content Stored XSS

Medium

Synopsis

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.

Solution

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.

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