CVE-2023-29451Network attack vector

Authenticated service crash via malformed Unicode JSONPath

Published Jul 13, 2023 · Updated Feb 13, 2025

Zabbix 6.0 through 6.0.14, 6.2 through 6.2.8, and 6.4 through 6.4.0 allow remote authenticated users to crash a server or proxy. JSON validation accepts invalid Unicode, after which JSONPath processing accesses an uninitialized buffer out of bounds instead of rejecting the string. The vendor score requires high privileges; the documented consequence is interruption of the targeted server or proxy process.

CVSS severity7.5
High
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Zabbix 6.0 through 6.0.14, 6.2 through 6.2.8, and 6.4 through 6.4.0 allow remote authenticated users to crash a server or proxy. JSON validation accepts invalid Unicode, after which JSONPath processing accesses an uninitialized buffer out of bounds instead of rejecting the string. The vendor score requires high privileges; the documented consequence is interruption of the targeted server or proxy process.

The record

CVE
CVE-2023-29451
Published
Jul 13, 2023
Updated
Feb 13, 2025
Vendor
Zabbix
Product
Zabbix
Classifications
CWE-20, CWE-787, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 13, 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

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=6.0 <=6.0.14 changes=[{"at":"6.0.15rc1","status":"unaffected"}]
  2. Affected versionversion=6.2 <=6.2.8 changes=[{"at":"6.2.9rc2","status":"unaffected"}]
  3. Affected versionversion=6.4 <=6.4.0 changes=[{"at":"6.4.1rc2","status":"unaffected"}]
  4. Affected versionversion=7.0.0alpha1 <=7.0.0alpha1 changes=[{"at":"7.0.0alpha1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zabbix · Zabbixversion=6.0 <=6.0.14 changes=[{"at":"6.0.15rc1","status":"unaffected"}]; version=6.2 <=6.2.8 changes=[{"at":"6.2.9rc2","status":"unaffected"}]; version=6.4 <=6.4.0 changes=[{"at":"6.4.1rc2","status":"unaffected"}]; version=7.0.0alpha1 <=7.0.0alpha1 changes=[{"at":"7.0.0alpha1","status":"unaffected"}]

Published CVSS scores

4.7Zabbix CNACVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
7.5NIST NVDCVSS:3.1/AV:N/AC:L/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-20Improper Input Validation
CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

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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