In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
https://zulip.readthedocs.io/en/2.1.7/overview/changelog.html#id35
Source: Mitre, NVD
Published: 2022-07-28
Updated: 2022-08-04
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N
Severity: High
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N