Package Instance

Cross-site Scripting
The 'manage groups' capability did not have the 'XSS risk' flag assigned to it, but does have that access in certain places. Note that the capability is intended for use by trusted users, and is only assigned to teachers and managers by default.

Injection Vulnerability
When a quiz question bank is imported, it is possible for the question preview that is displayed to execute JavaScript that is written into the question bank.

Information Exposure
A flaw was found in Moodle. It is possible for the `core_course_get_categories` web service to return hidden categories, which should be omitted when fetching course categories.

Improper Input Validation
An issue was discovered in Moodle. By substituting URLs in portfolios, users can instantiate any class. This can also be exploited by users who are logged in as guests to create a DDoS attack.

Cross-Site Request Forgery (CSRF)
The login form is not protected by a token to prevent login cross-site request forgery.

Improper Privilege Management
An issue was discovered in Moodle. Students who submitted assignments and exported them to portfolios can download any stored Moodle file by changing the download URL.

Improper Input Validation
The size of users' private file uploads via email were not correctly checked, so their quota allowance could be exceeded.

Information Exposure
In Moodle, the quiz web services allow students to see quiz results when it is prohibited in the settings.

Information Exposure
An issue was discovered in Moodle. Students who posted on forums and exported the posts to portfolios can download any stored Moodle file by changing the download URL.

Improper Authentication
A flaw was found in Moodle. If a user account using OAuth2 authentication method was once confirmed but later suspended, the user could still login to the site.

Cross-site Scripting
An issue was discovered in Moodle. An authenticated user is allowed to add HTML blocks containing scripts to their Dashboard; this is normally not a security issue because a personal dashboard is visible to this user only. Through this security vulnerability, users can move such a block to other pages where they can be viewed by other users.

Information Exposure
The `/userpix/` page did not escape users' full names, which are included as text when hovering over profile images. Note this page is not linked to by default and its access is restricted.

Improper Access Control
Unauthenticated users can trigger custom messages to admin via paypal enrol script. Paypal IPN callback script should only send error emails to admin after request origin was verified, otherwise admin email can be spammed.

Inclusion of Sensitive Information in Log Files
A flaw was found in Moodle. No option exists to omit logs from data privacy exports, which may contain details of other users who interacted with the requester.

Insufficient Access Control
The setting for blocked hosts list can be bypassed with multiple A record `hostnames`.

Injection Vulnerability
An issue was discovered in Moodle. A Teacher creating a Calculated question can intentionally cause remote code execution on the server.

URL Redirection to Untrusted Site (Open Redirect)
The form to upload cohorts contained a redirect field, which was not restricted to internal URLs.

URL Redirection to Untrusted Site (Open Redirect)
Links within assignment submission comments would open directly (in the same window). Although links themselves may be valid, opening within the same window and without the no-referrer header policy made them more susceptible to exploits.

Improper Input Validation
Users with the "login as other users" capability (such as administrators/managers) can access other users' Dashboards, but the JavaScript those other users may have added to their Dashboard was not being escaped when being viewed by the user logging in on their behalf.

Code Injection
Moodle is vulnerable to an XML import of ddwtos could lead to intentional remote code execution. When importing legacy `drag and drop into text` (ddwtos) type quiz questions, it was possible to inject and execute PHP code from within the imported questions, either intentionally or by importing questions from an untrusted source.

Cross-site Scripting
Moodle is vulnerable to a boost theme; the `blog` search GET parameter is insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the `search` parameter.

Server-Side Request Forgery (SSRF)
Moodle has Server Side Request Forgery in the `filepicker`.