XSS in Zulip
CVE-2026-24050
Zulip is an open-source team collaboration tool. From 5.0 to before 11.5, some administrative actions on the user profile were susceptible to stored XSS in group names or channel names. Exploiting these vulnerabilities required the user ex…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (13.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Zulip — versions >= 5.0, < 11.5
- Zulip Zulip_server
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-24050?
- CVE-2026-24050 is a medium-severity vulnerability in Zulip, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-02-06.
- How severe is CVE-2026-24050?
- Medium severity. CVSS v3 base score is 5.4 out of 10.