CVE-2024-42330Network attack vector

Hidden-property access via unencoded HTTP response headers

Published Nov 27, 2024 · Updated Nov 3, 2025

Injection in the Zabbix Server HttpRequest object allows remote authenticated users to access hidden properties via HTTP response headers. Header values from server responses are pushed into Duktape with duk_push_string without first replacing invalid UTF-8, creating internal strings that expose normally hidden object properties. A high-privilege user able to run server-side JavaScript can reach the flaw in 6.0.0 through 6.0.33, 6.4.0 through 6.4.18, and 7.0.0 through 7.0.3, compromising the script engine's isolation.

CVSS severity9.1
Critical
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Injection in the Zabbix Server HttpRequest object allows remote authenticated users to access hidden properties via HTTP response headers. Header values from server responses are pushed into Duktape with duk_push_string without first replacing invalid UTF-8, creating internal strings that expose normally hidden object properties. A high-privilege user able to run server-side JavaScript can reach the flaw in 6.0.0 through 6.0.33, 6.4.0 through 6.4.18, and 7.0.0 through 7.0.3, compromising the script engine's isolation.

The record

CVE
CVE-2024-42330
Published
Nov 27, 2024
Updated
Nov 3, 2025
Vendor
Zabbix
Product
Zabbix Frontend
Classifications
CWE-134, CAPEC-100, CAPEC-253
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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=6.0.0 <=6.0.33
  2. Affected versionversion=6.4.0 <=6.4.18
  3. Affected versionversion=7.0.0 <=7.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Zabbix · Zabbix Frontendversion=6.0.0 <=6.0.33; version=6.4.0 <=6.4.18; version=7.0.0 <=7.0.3
Zabbix · Zabbixversion=6.0.0 <=6.0.33 changes=[{"at":"6.0.34rc1","status":"unaffected"}]; version=6.4.0 <=6.4.18 changes=[{"at":"6.4.19rc1","status":"unaffected"}]; version=7.0.0 <=7.0.3 changes=[{"at":"7.0.4rc1","status":"unaffected"}]

Published CVSS scores

9.1ZabbixCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-134Use of Externally-Controlled Format String
CAPEC-100Overflow Buffers
CAPEC-253Remote Code Inclusion

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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