CVE intelligence and bounded remediation

CVE-2022-43515 — Zabbix Frontend provides a feature that allows admins to maintain the installation and ensure that only certain IP addresses can access it

Critical CVSS 9.8

Zabbix Frontend provides a feature that allows admins to maintain the installation and ensure that only certain IP addresses can access it. In this way, any user will not be able to access the Zabbix Frontend while it is being maintained and possible sensitive data will be prevented from being disclosed. An attacker can bypass this protection and access the instance using IP address not listed in the defined range.

Severity
Critical
CVSS
9.8 (3.1)
Published
2022-12-05
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-20, CWE-863

Affected products

  • zabbix / frontend
  • zabbix / frontend / 5.0.30
  • zabbix / frontend / 6.0.11
  • zabbix / frontend / 6.2.5

Showing 4 representative product identities from 7 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

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Check exposure

  • Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
  • Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
  • Use synthetic fixtures to compare intended access matrices without accessing another user's real data.

Remediate safely

  • Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
  • Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
  • Add deny-by-default policy tests for horizontal and vertical access across every affected transport.

Authoritative sources

Complete CVE record and remediation plan

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