Zulip Desktop before 5.4.3 allows XSS because string escaping is mishandled during composition of the HTML for the user interface.
https://blog.zulip.com/2020/09/10/zulip-desktop-5-4-3-security-release/
Source: Mitre, NVD
Published: 2020-09-10
Updated: 2026-06-17
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/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: 0.00359