An issue was discovered in Mattermost Server before 3.1.0. It allows XSS via theme color-code values.
https://mattermost.com/security-updates/
Source: Mitre, NVD
Published: 2020-06-19
Updated: 2020-06-25
Base Score: 3.5
Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N
Severity: Low
Base Score: 5.4
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Severity: Medium
EPSS: 0.00343