In Moodle 3.x, XSS can occur via evidence of prior learning.
https://moodle.org/mod/forum/discuss.php?d=349421
http://www.securitytracker.com/id/1038174
http://www.securityfocus.com/bid/96979
Source: Mitre, NVD
Published: 2017-03-26
Updated: 2017-07-12
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N