The version of Moodle installed on the remote host is 3.9.x prior to 3.9.11, 3.10.x prior to 3.10.8 or 3.11.x prior to 3.11.4. It is, therefore, affected by multiple vulnerabilities:

 - A Remote Code Execution when restoring malformed backup files. (CVE-2021-3943)

 - A vulnerable version of mlbackend python library included in Moodle.

 - A Cross-Site Scripting (XSS) vulnerability due to the lack of sanitization in or an URL parameter in the filetype site administrator tool. (CVE-2021-43558)

 - A Cross-Site Request Forgery (CSRF) vulnerability due to the lack of token check in the 'delete related badge' functionality. (CVE-2021-43559)

 - An Insecure Direct Object Reference (IDOR) vulnerability allowing users to fetch other users calendar action events. (CVE-2021-43560)

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

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

  - A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier     unsupported versions. Insufficient capability checks made it possible to fetch other users' calendar     action events. (CVE-2021-43560)

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

ID	Name	Product	Family	Published	Updated	Severity
113613	Moodle 3.9.x < 3.9.11 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	2/20/2023	3/14/2023	critical
113614	Moodle 3.10.x < 3.10.8 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	2/20/2023	3/14/2023	critical
113615	Moodle 3.11.x < 3.11.4 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	2/20/2023	3/14/2023	critical
261274	Linux Distros Unpatched Vulnerability : CVE-2021-43560	Nessus	Misc.	9/4/2025	9/4/2025	medium

Detections

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critical

critical

critical

medium