How severe is CVE-2023-29451?

CVE-2023-29451 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-29451 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-29451?

CVE-2023-29451 primarily affects Zabbix. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-29451?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-29451 published?

CVE-2023-29451 was published on 2023-07-13 and last updated on 2026-06-17.

CVE-2023-29451

CVE-2023-29451 is a medium-severity vulnerability in Zabbix with a CVSS 3.x base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Zabbix
Published: 2023-07-13
Last modified: 2026-06-17

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.

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 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-29451 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-29451?: CVE-2023-29451 primarily affects Zabbix. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-29451?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-29451 published?: CVE-2023-29451 was published on 2023-07-13 and last updated on 2026-06-17.

References

Affected products (11)

cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:6.4.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:6.4.0:beta1:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:6.4.0:beta2:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:6.4.0:beta3:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:6.4.0:beta4:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:6.4.0:beta5:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:6.4.0:beta6:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:6.4.0:rc2:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:6.4.0:rc3:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:6.4.0:rc4:*:*:*:*:*:*

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