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Fencer Vulns
medium 5.3

CVE-2022-43515 json

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

published 2022-12-05 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-46513

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 69%
public exploits
0
none known

Summary

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.

Patch / fix

  • zabbix Debian 14, Debian 13, Debian 12 1:6.0.13+dfsg-1

debian advisories DEBIAN-CVE-2022-43515

  • zabbix SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +4 more 4.0.12-4.21.1

suse advisories SUSE-SU-2022:4477-1

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • support.zabbix.com https://support.zabbix.com/browse/ZBX-22050 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Zabbix Frontend

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-863 Incorrect Authorization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.