The vulnerability was found Moodle which exists due to insufficient limitations on the "start page" preference. A remote attacker can set that preference for another user. The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The vulnerability was found Moodle which exists due to insufficient limitations on the start page     preference. A remote attacker can set that preference for another user. The vulnerability allows a remote     attacker to gain unauthorized access to otherwise restricted functionality. (CVE-2023-23923)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of Moodle installed on the remote host is 3.9.x prior to 3.9.19, 3.11.x prior to 3.11.12, 4.0.x prior to 4.0.6 or 4.1.x prior to 4.1.1. It is, therefore, affected by multiple vulnerabilities:

 - A Cross-Site Scripting (XSS) vulnerability due to the lack of sanitization of some returnurl parameters. (CVE-2023-23921)

 - A Cross-Site Scripting (XSS) vulnerability due to the lack of sanitization in the blog search functionnality. (CVE-2023-23922)

 - An Insecure Direct Object Reference (IDOR) vulnerability allowing users to set the preferred start page of any other user. (CVE-2023-23923)

Note that the scanner has not attempted to exploit this issue but has instead relied only on application's self-reported version number.

ID	Name	Product	Family	Severity
261508	Linux Distros Unpatched Vulnerability : CVE-2023-23923	Nessus	Misc.	high
113588	Moodle 4.1.x < 4.1.1 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high
113587	Moodle 4.0.x < 4.0.6 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high
113586	Moodle 3.11.x < 3.11.12 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high
113585	Moodle 3.9.x < 3.9.19 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	high

Detections

Analytics

CVE-2023-23923

high

Tenable Plugins

high

high

high

high

high