In Redmine before 3.2.7 and 3.3.x before 3.3.4, the reminders function in app/models/mailer.rb does not check whether an issue is visible, which allows remote authenticated users to obtain sensitive information by reading e-mail reminder messages.

Redmine before 3.2.6 and 3.3.x before 3.3.3 mishandles the rendering of wiki links, which allows remote attackers to obtain sensitive information.

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/helpers/applicationhelper.rb via a multi-value field with a crafted value that is mishandled during rendering of issue history.

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.

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/helpers/querieshelper.rb via a multi-value field with a crafted value that is mishandled during rendering of an issue list.

In Redmine before 3.2.6 and 3.3.x before 3.3.3, remote attackers can obtain sensitive information (password reset tokens) by reading a Referer log, because account/lostpassword does not use a redirect.

In Redmine before 3.2.6 and 3.3.x before 3.3.3, Redmine.pm lacks a check for whether the Repository module is enabled in a project's settings, which might allow remote attackers to obtain sensitive differences information or possibly have unspecified other impact.

In Redmine before 3.2.6 and 3.3.x before 3.3.3, stored XSS is possible by using an SVG document as an attachment.

In Redmine before 3.2.6 and 3.3.x before 3.3.3, XSS exists because markup is mishandled in wiki content.

Redmine before 3.2.6 and 3.3.x before 3.3.3 mishandles Time Entry rendering in activity views, which allows remote attackers to obtain sensitive information.

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/timelog/list.html.erb via crafted column data.