Vulnerability in zulip

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/zulip/zulip/commit/6f33a8fa345ba776039a3f46131c253599a3ba15
• github.com/zulip/zulip/commit/774d4c7b12755178fa406f0c0f3b2cafdbbec32c
• github.com/zulip/zulip/pull/39913
• github.com/zulip/zulip/releases/tag/12.2
• github.com/zulip/zulip/security/advisories/GHSA-3m37-hwq6-jrj8
• zulip.readthedocs.io/en/latest/overview/changelog.html