Is CVE-2023-29456 in the CISA KEV catalog?

No. CVE-2023-29456 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-29456?

CVE-2023-29456 has a CVSS v3 base score of 5.7 (MEDIUM).

What is the EPSS score for CVE-2023-29456?

CVE-2023-29456 has an EPSS score of 0.47% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-29456?

Upgrade zabbix on debian 11 to 1:5.0.44+dfsg-1+deb11u1 or later.

CVE & CISA-KEV Catalog

CVE-2023-29456

MEDIUM

5.7

CVSS v3

NVD

Description

URL validation scheme receives input from a user and then parses it to identify its various components. The validation scheme can ensure that all URL components comply with internet standards.

CWE-20Improper Input Validation CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

zabbixDebian

Fixed in:1:5.0.44+dfsg-1+deb11u1CVE-2023-29456

Fixed in:1:6.0.23+dfsg-1CVE-2023-29456

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.47%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Patch1

support.zabbix.com

Other references2

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.