Home/CVE/Zulip is an open-source team collaboration tool. From 5.0 to before 11.5, some administrative actions on the user profil
CVE

CVE-2026-24050

Zulip is an open-source team collaboration tool. From 5.0 to before 11.5, some administrative actions on the user profil

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 explicitly interacting with the problematic object.

This vulnerability is fixed in 11.5.

MEDIUM · CVSS 5.4 EPSS 0.00016
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

1
zulip server>= 5.0 and < 11.5
▣

Scoring & Timeline

5.4
MEDIUM · CVSS v3.1 · security-advisories@github.com
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Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Feb 2026 · 07:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/zulip/zulip/commit/e6093d9e4788f4d82236d856c5ed7b16767886a7Patch
https://github.com/zulip/zulip/releases/tag/11.5Release Notes
https://github.com/zulip/zulip/security/advisories/GHSA-56qv-8823-6fq9Vendor Advisory
https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-11-5Release Notes
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