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CVE-2022-43515

X-Forwarded-For header is active by default causes access to Zabbix sites in maintenance mode

Medium5.3Public exploitEPSS 1.3%
Published
Updated
Reserved
Assigned by
Zabbix

Description

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.

Public exploit

An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.

Timeline

  1. ID reserved

    By Zabbix

  2. · 54 days later

    Published

  3. · 3 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2022-43515, by who scored it
Scored byCVSSScoreVector
ZabbixCNA (assigner)3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVDNVD · Modified3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
1.3% · top 30% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: poc · Automatable: yes · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Weakness

Affected products

  • Zabbix · Frontend

    • affected 4.0.0-4.0.44
    • affected 5.0.0-5.0.29
    • affected 6.0.0-6.0.9
    • affected 6.2.0-6.2.4
    • unaffected 5.0.30rc1 – < unspecified
    • unaffected 6.0.11rc1 – < unspecified
    • unaffected 6.2.5rc1 – < unspecified

What to do

Solution: To remediate this vulnerability, apply the updates listed in the 'Unaffected' section to appropriate products or use the workaround

Workaround: If an immediate update is not possible, limit network access to Zabbix Frontend during the maintenance window.

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .