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/application_helper.rb via a multi-value field with a crafted value that is mishandled during rendering of issue history.
https://github.com/redmine/redmine/commit/94f7cfbf990028348b9262578acbc53a94fce448
https://www.debian.org/security/2018/dsa-4191
https://www.redmine.org/issues/27186
https://www.redmine.org/projects/redmine/wiki/Security_Advisories
Source: MITRE
Published: 2017-10-18
Updated: 2019-03-14
Type: CWE-79
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 8.6
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
Impact Score: 2.7
Exploitability Score: 2.8
Severity: MEDIUM