CVE-2021-27927

Description

In Zabbix from 4.0.x before 4.0.28rc1, 5.0.0alpha1 before 5.0.10rc1, 5.2.x before 5.2.6rc1, and 5.4.0alpha1 before 5.4.0beta2, the CControllerAuthenticationUpdate controller lacks a CSRF protection mechanism. The code inside this controller calls diableSIDValidation inside the init() method. An attacker doesn't have to know Zabbix user login credentials, but has to know the correct Zabbix URL and contact information of an existing user with sufficient privileges.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.15%
Vendor Advisory zabbix.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://support.zabbix.com/browse/ZBX-18942 patch vendor advisory issue tracking
https://lists.debian.org/debian-lts-announce/2023/04/msg00013.html mailing list

Frequently Asked Questions

What is the severity of CVE-2021-27927?
CVE-2021-27927 has been scored as a high severity vulnerability.
How to fix CVE-2021-27927?
To fix CVE-2021-27927, 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-2021-27927 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-27927 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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