jenkins before versions 2.44, 2.32.2 is vulnerable to a persisted cross-site scripting in search suggestions due to improperly escaping users with less-than and greater-than characters in their names (SECURITY-388).
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2610
https://github.com/jenkinsci/jenkins/commit/307ed31caba68a46426b8c73a787a05add2c7489