In Moodle 3.x, there is XSS in the assignment submission page.

In Moodle 2.x and 3.x, the question engine allows access to files that should not be available.

In Moodle 2.x and 3.x, non-admin site managers may accidentally edit admins via web services.

In Moodle 2.x and 3.x, the capability to view course notes is checked in the wrong context.

In Moodle 2.x and 3.x, there is incorrect sanitization of attributes in forums.

Moodle 3.1.2 allows remote attackers to obtain sensitive information via unspecified vectors, related to a "SQL Injection" issue affecting the Administration panel function in the installation process component. NOTE: the vendor disputes the relevance of this report, noting that "the person who is installing Moodle must know database access credentials and they can access the database directly; there is no need for them to create a SQL injection in one of the installation dialogue fields.

Multiple cross-site scripting (XSS) vulnerabilities in Flowplayer Flash before 3.2.17, as used in Moodle through 2.3.11, 2.4.x before 2.4.9, 2.5.x before 2.5.5, and 2.6.x before 2.6.2, allow remote attackers to inject arbitrary web script or HTML by (1) providing a crafted playerId or (2) referencing an external domain, a related issue to CVE-2013-7342.

Cross-site scripting (XSS) vulnerability in io.swf in the IO Utility component in Yahoo! YUI 3.0.0 through 3.9.1, as used in Moodle through 2.1.10, 2.2.x before 2.2.11, 2.3.x before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.1, and other products, allows remote attackers to inject arbitrary web script or HTML via a crafted string in a URL.

Cross-site scripting (XSS) vulnerability in io.swf in the IO Utility component in Yahoo! YUI 3.10.2, as used in Moodle through 2.1.10, 2.2.x before 2.2.11, 2.3.x before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.1, and other products, allows remote attackers to inject arbitrary web script or HTML via a crafted string in a URL. NOTE: this vulnerability exists because of a CVE-2013-4939 regression.

Cross-site scripting (XSS) vulnerability in uploader.swf in the Uploader component in Yahoo! YUI 3.2.0 through 3.9.1, as used in Moodle through 2.1.10, 2.2.x before 2.2.11, 2.3.x before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.1, and other products, allows remote attackers to inject arbitrary web script or HTML via a crafted string in a URL.