CVE-2022-23134Known exploitationPublic exploitNetwork attack vector

Configuration overwrite via unsigned setup session

Published Jan 13, 2022 · Updated Oct 21, 2025

Improper access control in Zabbix Frontend 5.4.0 through 5.4.8 allows remote attackers to overwrite its configuration. setup.php trusts attacker-controlled, unsigned client-side session fields, so a forged step value of 6 reaches CSetupWizard::stage6 and writes conf/zabbix.conf.php. No authentication or user interaction is required, but exploitation requires a completed installation with the setup script present and database credentials that pass the wizard's connection check.

CVSS severity3.7
Low
EPSS probability93.89%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Zabbix Frontend 5.4.0 through 5.4.8 allows remote attackers to overwrite its configuration. setup.php trusts attacker-controlled, unsigned client-side session fields, so a forged step value of 6 reaches CSetupWizard::stage6 and writes conf/zabbix.conf.php. No authentication or user interaction is required, but exploitation requires a completed installation with the setup script present and database credentials that pass the wizard's connection check.

The record

CVE
CVE-2022-23134
Published
Jan 13, 2022
Updated
Oct 21, 2025
Vendor
Zabbix
Product
Zabbix Frontend
Classifications
CWE-284, CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.4.0 - 5.4.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zabbix · Zabbix Frontendversion=5.4.0 - 5.4.8

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.7ZabbixCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsShadowserver observations through Sep 28, 2026. Gaps indicate unavailable data.
Sep 22, 2026Sep 28, 2026
View daily counts
Reporting dayUnique IPs
Sep 22, 20261
Sep 23, 2026Unavailable
Sep 24, 20261
Sep 25, 2026Unavailable
Sep 26, 20261
Sep 27, 20261
Sep 28, 20261
Latest reporting daySep 28, 2026
Latest daily unique IPs1
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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