Is CVE-2023-43208 in the CISA KEV catalog?

Yes. CVE-2023-43208 is on the CISA Known Exploited Vulnerabilities list, added 2024-05-20, and has known ransomware campaign use.

What is the CVSS severity of CVE-2023-43208?

CVE-2023-43208 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2023-43208?

CVE-2023-43208 has an EPSS score of 82.71% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-43208?

Upgrade mirth connect to 4.4.1 or later.

CVE & CISA-KEV Catalog

CVE-2023-43208

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

NextGen Healthcare Mirth Connect before version 4.4.1 is vulnerable to unauthenticated remote code execution. Note that this vulnerability is caused by the incomplete patch of CVE-2023-37679.

CWE-78OS Command Injection CWE-502Deserialization of Untrusted Data

How to fix

Remediation Available

mirth connectNVD

Affected:< 4.4.1Fixed in:4.4.1CVE-2023-43208derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

82.71%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

NextGen Healthcare Mirth Connect Deserialization of Untrusted Data Vulnerability

NextGen Healthcare Mirth Connect contains a deserialization of untrusted data vulnerability that allows for unauthenticated remote code execution via a specially crafted request.

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Remediation due: 2024-06-10

Associated with ransomware campaigns

References

Exploit2

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-78 (OS Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-1498	Critical	9.8	100%	KEV	Fix
CVE-2014-6271	Critical	9.8	100%	KEV	Fix
CVE-2019-16920	Critical	9.8	100%	KEV	-
CVE-2022-44877	Critical	9.8	100%	KEV	Fix
CVE-2020-8515	Critical	9.8	100%	KEV	-
CVE-2020-9054	Critical	9.8	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 2025-10-31.