Zulip is an open-source team collaboration tool. From 11.0 until 12.2, organizations with web-public channels enabled exposed the GET /json/users endpoint to logged-out spectators, and a missing access-control check allowed include_custom_profile_fields=true to return every user's custom profile field values in addition to the documented limited directory data. This exposed those custom profile field values to unauthenticated visitors. This issue is fixed in version 12.2.

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History

Wed, 04 Nov 2026 19:30:00 +0000

Type Values Removed Values Added
Description Zulip is an open-source team collaboration tool. From 11.0 until 12.2, organizations with web-public channels enabled exposed the GET /json/users endpoint to logged-out spectators, and a missing access-control check allowed include_custom_profile_fields=true to return every user's custom profile field values in addition to the documented limited directory data. This exposed those custom profile field values to unauthenticated visitors. This issue is fixed in version 12.2.
Title Zulip: Custom profile fields can be read by logged-out visitors in organization with web-public channels
Weaknesses CWE-862
References
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'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-11-04T19:13:01.759Z

Reserved: 2026-10-22T22:53:15.238Z

Link: CVE-2026-115574

cve-icon Vulnrichment

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cve-icon NVD

Status : Received

Published: 2026-11-04T20:19:02.313

Modified: 2026-11-04T20:19:02.313

Link: CVE-2026-115574

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses