In Redmine before 3.2.8, 3.3.x before 3.3.5, and 3.4.x before 3.4.3, XSS exists in app/views/issues/_list.html.erb via crafted column data.
https://www.redmine.org/projects/redmine/wiki/Security_Advisories
https://www.redmine.org/issues/27186
https://www.debian.org/security/2018/dsa-4191
https://github.com/redmine/redmine/commit/273dd9cb3bcfb1e0a0b90570b3b34eafa07d67aa