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.
https://www.redmine.org/projects/redmine/wiki/Security_Advisories
https://www.redmine.org/issues/24199
https://www.debian.org/security/2018/dsa-4191
Source: Mitre, NVD
Published: 2017-10-18
Updated: 2019-03-14
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