CVE-2023-32723Network attack vector

Authenticated SSRF via pre-authorization LDAP connection

Published Oct 12, 2023 · Updated Feb 13, 2025

SSRF in affected Zabbix Frontend releases allows remote authenticated users to make the server initiate LDAP requests to chosen endpoints. CControllerAuthenticationUpdate calls validateLdap() during input validation, so the LDAP connection occurs before checkPermissions(). A low-privileged account is required; affected lines are 4.0.0 through 4.0.19rc1, 4.4.0 through 4.4.7rc1, and 5.0.0alpha1 through 5.0.0alpha3.

CVSS severity8.5
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in affected Zabbix Frontend releases allows remote authenticated users to make the server initiate LDAP requests to chosen endpoints. CControllerAuthenticationUpdate calls validateLdap() during input validation, so the LDAP connection occurs before checkPermissions(). A low-privileged account is required; affected lines are 4.0.0 through 4.0.19rc1, 4.4.0 through 4.4.7rc1, and 5.0.0alpha1 through 5.0.0alpha3.

The record

CVE
CVE-2023-32723
Published
Oct 12, 2023
Updated
Feb 13, 2025
Vendor
Zabbix
Product
Zabbix
Classifications
CWE-732, CAPEC-101, T1090
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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=4.0.0 <=4.0.19rc1 changes=[{"at":"4.0.20rc1","status":"unaffected"}]
  2. Affected versionversion=4.4.0 <=4.4.7rc1 changes=[{"at":"4.4.8rc1","status":"unaffected"}]
  3. Affected versionversion=5.0.0alpha1 <=5.0.0alpha4 changes=[{"at":"5.0.0alpha4","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zabbix · Zabbixversion=4.0.0 <=4.0.19rc1 changes=[{"at":"4.0.20rc1","status":"unaffected"}]; version=4.4.0 <=4.4.7rc1 changes=[{"at":"4.4.8rc1","status":"unaffected"}]; version=5.0.0alpha1 <=5.0.0alpha4 changes=[{"at":"5.0.0alpha4","status":"unaffected"}]

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
8.5ZabbixCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
CAPEC-101Server Side Include (SSI) Injection
T1090Proxy

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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