CVE-2020-9444: Zulip Server

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

Zulip Server before 2.1.3 allows reverse tabnabbing via the Markdown functionality.

Affected products

• Zulip Zulip Server: up to and including 2.1.3

Published 2020-04-20. Last modified 2026-06-17.