Server-Side Request Forgery (SSRF)
Moodle before 3.1.10, 3.2.x before 3.2.7, 3.3.x before 3.3.4 and 3.4.x before 3.4.1 has Server Side Request Forgery in the filepicker.
CWE-918 - Server-Side Request Forgery (SSRF)
Server-side request forgery (SSRF) is a weakness that allows an attacker to send an arbitrary request, making it appear that the request was sent by the server. This request may bypass a firewall that would normally prevent direct access to the URL. The impact of this vulnerability can vary from unauthorized access to files and sensitive information to remote code execution.