Redmine before 4.0.7 and 4.1.x before 4.1.1 has XSS via the back_url field.
https://www.redmine.org/projects/redmine/wiki/Security_Advisories
https://lists.debian.org/debian-lts-announce/2021/05/msg00013.html
Source: Mitre, NVD
Published: 2021-04-06
Updated: 2021-06-01
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
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