What is the severity of CVE-2021-27927?

The severity of CVE-2021-27927 is high.

How can I fix CVE-2021-27927?

To fix CVE-2021-27927, you should upgrade your Zabbix installation to version 4.0.28rc1, 5.0.10rc1, 5.2.6rc1, or 5.4.0beta2.

What is the affected software for CVE-2021-27927?

The affected software for CVE-2021-27927 is Zabbix versions 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.

Does CVE-2021-27927 have a CSRF protection mechanism?

No, CVE-2021-27927 does not have a CSRF protection mechanism.

Where can I find more information about CVE-2021-27927?

You can find more information about CVE-2021-27927 in the Debian LTS announcement and the Zabbix support website.

Vulnerability/
CVE-2021-27927

high

8.8

CWE

352

3/3/2021

3/8/2024

CVE-2021-27927: CSRF

First published: Wed Mar 03 2021(Updated: )

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.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Zabbix Server	>=4.0.0<=4.0.27
Zabbix Server	>=5.0.0<=5.0.9
Zabbix Server	>=5.2.0<=5.2.3

Remedy

https://support.zabbix.com/browse/ZBX-18942

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-27927?
The severity of CVE-2021-27927 is high.
How can I fix CVE-2021-27927?
To fix CVE-2021-27927, you should upgrade your Zabbix installation to version 4.0.28rc1, 5.0.10rc1, 5.2.6rc1, or 5.4.0beta2.
What is the affected software for CVE-2021-27927?
The affected software for CVE-2021-27927 is Zabbix versions 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.
Does CVE-2021-27927 have a CSRF protection mechanism?
No, CVE-2021-27927 does not have a CSRF protection mechanism.
Where can I find more information about CVE-2021-27927?
You can find more information about CVE-2021-27927 in the Debian LTS announcement and the Zabbix support website.

agent/references
agent/type
collector/mitre-cve
source/MITRE
agent/remedy
agent/severity
agent/last-modified-date
agent/author
agent/description
agent/event
agent/first-publish-date
agent/source
agent/weakness
agent/tags
agent/softwarecombine
collector/nvd-index
agent/software-canonical-lookup-request
vendor/zabbix
canonical/zabbix server
version/zabbix server/4.0.0
version/zabbix server/4.0.27
version/zabbix server/5.0.0
version/zabbix server/5.0.9
version/zabbix server/5.2.0
version/zabbix server/5.2.3

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.