Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zabbix | Zabbix | >= 4.0.0, <= 4.0.27 |
Related Weaknesses (CWE)
References
- https://lists.debian.org/debian-lts-announce/2023/04/msg00013.html
- https://support.zabbix.com/browse/ZBX-18942Issue TrackingPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00013.html
- https://support.zabbix.com/browse/ZBX-18942Issue TrackingPatchVendor Advisory
FAQ
What is CVE-2021-27927?
CVE-2021-27927 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 me...
How severe is CVE-2021-27927?
CVE-2021-27927 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-27927?
Check the references section above for vendor advisories and patch information. Affected products include: Zabbix Zabbix.