In Nessus before 7.1.0, Session Fixation exists due to insufficient session management within the application. An authenticated attacker could maintain system access due to session fixation after a user password change.

In Nessus before 7.1.0, a XSS vulnerability exists due to improper input validation. A remote authenticated attacker could create and upload a .nessus file, which may be viewed by an administrator allowing for the execution of arbitrary script code in a user's browser session. In other scenarios, XSS could also occur by altering variables from the Advanced Settings.

Tenable Appliance versions 4.6.1 and earlier have been found to contain a single XSS vulnerability. Utilizing a specially crafted request, an authenticated attacker could potentially execute arbitrary JavaScript code by manipulating certain URL parameters related to offline plugins.

When installing Nessus to a directory outside of the default location, Nessus versions prior to 7.0.3 did not enforce secure permissions for sub-directories. This could allow for local privilege escalation if users had not secured the directories in the installation location.

The moment module before 2.19.3 for Node.js is prone to a regular expression denial of service via a crafted date string, a different vulnerability than CVE-2016-4055.

SecurityCenter versions 5.5.0, 5.5.1 and 5.5.2 contain a SQL Injection vulnerability that could be exploited by an authenticated user with sufficient privileges to run diagnostic scans. An attacker could exploit this vulnerability by entering a crafted SQL query into the password field of a diagnostic scan within SecurityCenter. Successful exploitation of this vulnerability could allow an attacker to gain unauthorized access.

When linking a Nessus scanner or agent to Tenable.io or other manager, Nessus 6.x before 6.11 does not verify the manager's TLS certificate when making the initial outgoing connection. This could allow man-in-the-middle attacks.

Cross-site scripting vulnerability in Nessus versions 6.8.0, 6.8.1, 6.9.0, 6.9.1 and 6.9.2 allows remote authenticated attackers to inject arbitrary web script or HTML via unspecified vectors.

Tenable Appliance 4.4.0, and possibly prior, contains a flaw in the Web UI that allows for the unauthorized manipulation of the admin password.

Tenable Appliance 3.5 - 4.4.0, and possibly prior versions, contains a flaw in the simpleupload.py script in the Web UI. Through the manipulation of the tns_appliance_session_user parameter, a remote attacker can inject arbitrary commands.