Zulip Server before 2.1.3 allows XSS via a Markdown link, with resultant account takeover.
https://www.coresecurity.com/advisories/zulip-account-takeover-stored-xss
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: 3.5
Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N
Severity: Low
Base Score: 5.4
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Severity: Medium
EPSS: 0.00302