CVE-2023-29451

Name: CVE-2023-29451
Creator: NVD / NIST
Published: 2023-07-13T10:15:09.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2023-29451 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Specially crafted string can cause a buffer overrun in the JSON parser library leading to a crash of the Zabbix Server or a Zabbix Proxy.. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

Specially crafted string can cause a buffer overrun in the JSON parser library leading to a crash of the Zabbix Server or a Zabbix Proxy.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.66%

47.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Zabbix	Zabbix	<= 6.0.14	—
Zabbix	Zabbix	>= 6.4.2, <= 6.4.4	—
Zabbix	Zabbix	6.4.0	Alpha1

References

Timeline

Published: Jul 13, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-29451?

Specially crafted string can cause a buffer overrun in the JSON parser library leading to a crash of the Zabbix Server or a Zabbix Proxy.

How severe is CVE-2023-29451?

CVE-2023-29451 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2023-29451?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-29451?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST