CVE-2020-10857: Zulip Desktop

Critical severity, CVSS 9.8. EPSS: 3% chance of exploitation in the next 30 days.

Zulip Desktop before 5.0.0 improperly uses shell.openExternal and shell.openItem with untrusted content, leading to remote code execution.

Affected products

• Zulip Zulip Desktop: before 5.0.0 (fixed in 5.0.0)

Published 2021-02-05. Last modified 2026-06-17.