Zulip Server before 2.1.3 allows reverse tabnabbing via the Markdown functionality.
https://blog.zulip.org/2020/04/01/zulip-server-2-1-3-security-release/
Source: Mitre, NVD
Published: 2020-04-20
Updated: 2026-06-17
Base Score: 5.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.00197