CVE-2021-27927 Cross-site request forgery in n/a
An attacker can perform unauthorized actions on behalf of a logged-in Zabbix administrator by exploiting a missing CSRF protection in the authentication update controller.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-27927?
CVE-2021-27927 is a high-severity vulnerability in Zabbix Zabbix, published on 3 Mar 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-352
Which versions are affected by CVE-2021-27927?
It affects 1 product.
Products include Zabbix Zabbix.
How do I fix CVE-2021-27927?
Upgrade to a fixed version.
Is CVE-2021-27927 being exploited?
There is no known exploitation of CVE-2021-27927 in the wild and no public exploit code.
Other vulnerabilities in Zabbix Zabbix
Sources
Also known as DEBIAN-CVE-2021-27927, GHSA-3mh6-r7m6-r42x, UBUNTU-CVE-2021-27927.