CVE-2023-29449Network attack vector

Service interruption via unbounded JavaScript resource use

Published Jul 13, 2023 · Updated Nov 3, 2025

Uncontrolled resource consumption in Zabbix server and proxy JavaScript allows remote authenticated users to interrupt monitoring services. The server and proxy execute administrator-supplied preprocessing, webhook, or global-script JavaScript without limits on CPU, memory allocation, or disk I/O. Admin or Superadmin access is required to configure or test these scripts, which can exhaust host resources and hang or crash monitoring services.

CVSS severity5.9
Medium
EPSS probability1.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Zabbix server and proxy JavaScript allows remote authenticated users to interrupt monitoring services. The server and proxy execute administrator-supplied preprocessing, webhook, or global-script JavaScript without limits on CPU, memory allocation, or disk I/O. Admin or Superadmin access is required to configure or test these scripts, which can exhaust host resources and hang or crash monitoring services.

The record

CVE
CVE-2023-29449
Published
Jul 13, 2023
Updated
Nov 3, 2025
Vendor
Zabbix
Product
Zabbix
Classifications
CWE-400, CWE-770, T1499.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 13, 2023CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.4.4 <=4.4.*
  2. Affected versionversion=5.0.0alpha1 <=5.0.31 changes=[{"at":"5.0.32rc1","status":"unaffected"}]
  3. Affected versionversion=5.2.0alpha1 <=5.2.*
  4. Affected versionversion=5.4.0alpha1 <=5.4.*
  5. Affected versionversion=6.0.0alpha1 <=6.0.13 changes=[{"at":"6.0.14rc1 (6.0.16 is recommended)","status":"unaffected"}]
  6. Affected versionversion=6.2.0alpha1 <=6.2.7 changes=[{"at":"6.2.8rc1","status":"unaffected"}]
  7. Affected versionversion=6.4.0alpha1 <=6.4.0beta6 changes=[{"at":"6.4.0rc2","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zabbix · Zabbixversion=4.4.4 <=4.4.*; version=5.0.0alpha1 <=5.0.31 changes=[{"at":"5.0.32rc1","status":"unaffected"}]; version=5.2.0alpha1 <=5.2.*; version=5.4.0alpha1 <=5.4.*; version=6.0.0alpha1 <=6.0.13 changes=[{"at":"6.0.14rc1 (6.0.16 is recommended)","status":"unaffected"}]; version=6.2.0alpha1 <=6.2.7 changes=[{"at":"6.2.8rc1","status":"unaffected"}]; version=6.4.0alpha1 <=6.4.0beta6 changes=[{"at":"6.4.0rc2","status":"unaffected"}]

Published CVSS scores

4.9NISTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
5.9ZabbixCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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 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-400Uncontrolled Resource Consumption
CWE-770Allocation of Resources Without Limits or Throttling
T1499.003Application Exhaustion Flood

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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