CVEs / CVE-2023-43208

CVE-2023-43208: NextGen Healthcare Mirth Connect Deserialization of Untrusted Data Vulnerability

Known exploited in the CISA KEV catalog since 20 May 2024
critical 9.8 CVSS 3.1 (NVD)
EPSS 85.4% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
Last changed at its sources 28 Oct 2026

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Summary

NextGen Healthcare Mirth Connect contains a deserialization of untrusted data vulnerability that allows for unauthenticated remote code execution via a specially crafted request.
CISA, Known Exploited Vulnerabilities catalog

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.
The CVE record, via NVD · published 26 Oct 2023 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
n/a n/a	n/a	—

Exploitation

In CISA KEV since	20 May 2024
Due date for US federal agencies	10 Jun 2024
Used in ransomware campaigns	Known
Required action	Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Severity

CVSS 3.1	9.8 critical `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Scored by NVD
Weakness	CWE-78, CWE-502

References

CVE-2023-43208 on NVD
CVE-2023-43208 in the CISA KEV catalog
https://github.com/nextgenhealthcare/connect/wiki/4.4.1---What%27s-New (cited by CISA)
CVE-2023-43208 on OSV
http://packetstormsecurity.com/files/176920/Mirth-Connect-4.4.0-Remote-Command-Execution.html Exploit, Third Party Advisory, VDB Entry
https://www.horizon3.ai/nextgen-mirth-connect-remote-code-execution-vulnerability-cve-2023-43208/ Exploit, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43208 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.