In Moodle before 3.9.1, 3.8.4 and 3.7.7, the filter in the admin task log required extra sanitizing to prevent a reflected XSS risk.
{
"cpes": [
"cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
"cpe:2.3:a:moodle:moodle:3.9.0:-:*:*:*:*:*:*"
],
"severity": "Medium"
}