CVE-2021-30478

Description

An issue was discovered in Zulip Server before 3.4. A bug in the implementation of the can_forge_sender permission (previously is_api_super_user) resulted in users with this permission being able to send messages appearing as if sent by a system bot, including to other organizations hosted by the same Zulip installation.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.14%
Vendor Advisory zulip.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://blog.zulip.com/2021/04/14/zulip-server-3-4/ release notes vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-30478?
CVE-2021-30478 has been scored as a medium severity vulnerability.
How to fix CVE-2021-30478?
To fix CVE-2021-30478, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-30478 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-30478 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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