The wp-cerber plugin before 2.7 for WordPress has XSS via the X-Forwarded-For HTTP header.
https://wordpress.org/plugins/wp-cerber/#developers
Source: Mitre, NVD
Published: 2019-09-17
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