A reflected XSS issue was identified in the LTI module of Moodle. The vulnerability exists due to insufficient sanitization of user-supplied data in the LTI module. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website to steal potentially sensitive information, change appearance of the web page, can perform phishing and drive-by-download attacks. This vulnerability does not impact authenticated users.

Moodle is a free and open-source learning management system written in PHP. Moodle versions before 3.9.15, 3.11.x before 3.11.8 and 4.0.x before 4.0.2 suffer from a Cross-Site Scripting (XSS) vulnerability through the LTI module which only affects unauthenticated users. By crafting a specific HTTP request, an attacker could leverage this vulnerability to execute malicious JavaScript in the context of unauthenticated users browsers.

The version of Moodle installed on the remote host is 3.9.x prior to 3.9.15, 3.11.x prior to 3.11.8 or 4.0.x prior to 4.0.2. It is, therefore, affected by multiple vulnerabilities:

 - A code injection through an omitted execution parameter elading to Remote Code Execution (RCE) for sites running GhostScript versions older than 9.50. (CVE-2022-35649)

 - An arbitrary file read due to an insufficient path checks in a lesson question import available to teachers, managers and admins by default. (CVE-2022-35650)

 - A stored Cross-Site Scripting (XSS) and blind Server-Side Request Forgery (SSRF) vulnerabilities due to an insufficient sanitizing of SCORM track details. (CVE-2022-35651)

 - An open redirect vulnerability due to the lack of sanitization in the mobile auto-login URL. (CVE-2022-35652)

 - A Cross-Site Scripting (XSS) vulnerability in the LTI module only affecting unauthentication users. (CVE-2022-35653)

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
113829	Moodle < 3.9.15 / 3.11.x < 3.11.8 / 4.0.x < 4.0.2 LTI Module Cross-Site-Scripting	Web App Scanning	Component Vulnerability	medium
113602	Moodle 4.0.x < 4.0.2 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	critical
113601	Moodle 3.11.x < 3.11.8 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	critical
113600	Moodle 3.9.x < 3.9.15 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	critical

Detections

Analytics

CVE-2022-35653

medium

Tenable Plugins

medium

critical

critical

critical