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.

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.

ID	Name	Product	Family	Severity
113615	Moodle 3.11.x < 3.11.4 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	critical
113614	Moodle 3.10.x < 3.10.8 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	critical
113613	Moodle 3.9.x < 3.9.11 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	critical

Detections

Analytics

CVE-2021-43560

medium

Tenable Plugins

critical

critical

critical