Jenkins CAS Plugin 1.6.2 and earlier does not invalidate the previous session on login.
https://www.jenkins.io/security/advisory/2023-05-16/#SECURITY-3000
Source: Mitre, NVD
Published: 2023-05-16
Updated: 2023-05-30
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity: High