jenkins before versions 2.44, 2.32.2 is vulnerable to an information disclosure vulnerability in search suggestions (SECURITY-385). The autocomplete feature on the search box discloses the names of the views in its suggestions, including the ones for which the current user does not have access to.
https://github.com/jenkinsci/jenkins/commit/13905d8224899ba7332fe9af4e330ea96a2ae319