CVE-2021-27927 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8