CVE-2021-30479

Medium

Description

An issue was discovered in Zulip Server before 3.4. A bug in the implementation of the all_public_streams API feature resulted in guest users being able to receive message traffic to public streams that should have been only accessible to members of the organization.

SeverityMedium
CVSS5.3
Exploit probability—
ProductZulip Server
PublishedApr 15, 2021
First seenApr 15, 2021

How to fix

Update
  • zulip zulip_server3.4 or later

Affected products

ProductAffected versionsFixed in
zulip zulip_serverv < 3.43.4

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