CVE-2021-30479: Medium severity zulip server vulnerability
An issue was discovered in Zulip Server before 3.4. A bug in the implementation of the allpublicstreams 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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-30479?
CVE-2021-30479 is a vulnerability in Zulip Server before version 3.4 that allows guest users to receive message traffic to public streams that should have been only accessible to members of the organization.
How can the CVE-2021-30479 vulnerability affect my system?
The CVE-2021-30479 vulnerability can allow unauthorized guest users to access message traffic meant for members of the organization in Zulip Server before version 3.4.
What is the severity of CVE-2021-30479?
CVE-2021-30479 has a severity rating of medium with a CVSS score of 5.3.
How do I fix the CVE-2021-30479 vulnerability?
To fix the CVE-2021-30479 vulnerability, upgrade your Zulip Server installation to version 3.4 or newer.
Where can I find more information about CVE-2021-30479?
You can find more information about CVE-2021-30479 in the Zulip Server 3.4 release notes: https://blog.zulip.com/2021/04/14/zulip-server-3-4/