CVE-2021-30477: Medium severity zulip server vulnerability
Published Apr 14, 2021
·Updated
An issue was discovered in Zulip Server before 3.4. A bug in the implementation of replies to messages sent by outgoing webhooks to private streams meant that an outgoing webhook bot could be used to send messages to private streams that the user was not intended to be able to send messages to.
Affected Software
1 affected component
Zulip Server<3.4
Event History
Apr 14, 2021
CVE Published
via MITRE·11:45 PM
Data Sourced
via MITRE·11:45 PM
Description
Frequently Asked Questions
1
What is the vulnerability ID of this issue?
The vulnerability ID of this issue is CVE-2021-30477.
2
What is the severity rating of CVE-2021-30477?
CVE-2021-30477 has a severity rating of 4.3 (medium).
3
What is the affected software of CVE-2021-30477?
The affected software of CVE-2021-30477 is Zulip Server before version 3.4.
4
What is the description of CVE-2021-30477?
CVE-2021-30477 is a vulnerability in Zulip Server that allows outgoing webhook bots to send messages to private streams they are not supposed to.
5
How can I fix CVE-2021-30477?
To fix CVE-2021-30477, you should update Zulip Server to version 3.4 or later.