Zulip server provides an open-source team chat that helps teams stay productive and focused. Zulip Server 7.0 and above are vulnerable to an information disclose attack, where, if a Zulip server is hosting multiple organizations, an unauthenticated user can make a request and determine if an email address is in use by a user. Zulip Server 9.4 resolves the issue, as does the `main` branch of Zulip Server. Users are advised to upgrade. There are no known workarounds for this issue.
Advisories
Source ID Title
EUVD EUVD EUVD-2024-52989 Zulip server provides an open-source team chat that helps teams stay productive and focused. Zulip Server 7.0 and above are vulnerable to an information disclose attack, where, if a Zulip server is hosting multiple organizations, an unauthenticated user can make a request and determine if an email address is in use by a user. Zulip Server 9.4 resolves the issue, as does the `main` branch of Zulip Server. Users are advised to upgrade. There are no known workarounds for this issue.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sat, 27 Sep 2025 00:30:00 +0000

Type Values Removed Values Added
First Time appeared Zulip zulip Server
CPEs cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:* cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*
Vendors & Products Zulip zulip Server

Wed, 27 Aug 2025 02:30:00 +0000

Type Values Removed Values Added
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Thu, 06 Feb 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 16 Jan 2025 19:30:00 +0000

Type Values Removed Values Added
Description Zulip server provides an open-source team chat that helps teams stay productive and focused. Zulip Server 7.0 and above are vulnerable to an information disclose attack, where, if a Zulip server is hosting multiple organizations, an unauthenticated user can make a request and determine if an email address is in use by a user. Zulip Server 9.4 resolves the issue, as does the `main` branch of Zulip Server. Users are advised to upgrade. There are no known workarounds for this issue.
Title /api/v1/jwt/fetch_api_key endpoint can leak if an email address has an account in Zulip server
Weaknesses CWE-200
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-02-06T21:29:12.118Z

Reserved: 2024-12-16T17:30:30.068Z

Link: CVE-2024-56136

cve-icon Vulnrichment

Updated: 2025-01-16T19:50:21.769Z

cve-icon NVD

Status : Analyzed

Published: 2025-01-16T20:15:33.047

Modified: 2025-09-27T00:16:08.497

Link: CVE-2024-56136

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-07-12T16:01:26Z