Which products and versions are affected by CVE-2023-43208?

Affected: Mirth Connect (Nextgen). The full list is in the CVE brief.

Is CVE-2023-43208 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 7, 2024 and is known to be used in ransomware campaigns.

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

Yes. It was added on May 20, 2024 with a federal remediation due date of Jun 10, 2024.

Is there a public exploit for CVE-2023-43208?

Public exploit code is available.

Is there a fix for CVE-2023-43208?

Fixed versions are available, including Mirth Connect 4.4.1.

How urgently should CVE-2023-43208 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2023-43208

CriticalExploitedPublic exploit

NextGen Healthcare Mirth Connect before version 4.4.1 is vulnerable to unauthenticated remote code execution.

Published Oct 26, 2023 · Updated Oct 8, 2026

Key Facts

Patch immediately

CVE-2023-43208 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Mirth Connect (Nextgen).
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 7, 2024 and is known to be used in ransomware campaigns. Public exploit code is available.
EPSS estimates a 83% probability of exploitation in the next 30 days.
Fixed versions are available, including Mirth Connect 4.4.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

9.8

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

EPSS (30-day exploit likelihood)

83%

Higher than 99.6% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings, used by ransomware

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2023-43208 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	May 20, 2024	Jun 10, 2024	Known
Industry KEV feed	Mar 7, 2024	Jun 10, 2024	Known
CIRCL KEV	May 20, 2024	Jun 10, 2024	Known
ENISA EUVD	May 20, 2024	n/a	Not reported

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

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
Mirth ConnectNextgen	See advisory	4.4.1

Patched Releases

Mirth Connect

4.4.1

Timeline

Publicly disclosed
Oct 26, 2023
Added to Industry KEV feed
Mar 7, 2024
Added to CISA KEV
May 20, 2024
Added to CIRCL KEV
May 20, 2024
Added to ENISA EUVD
May 20, 2024
Last updated
Oct 8, 2026

Weakness Type

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-502 Deserialization of Untrusted Data

References

11 more references in the full CVE brief

FAQ

Common Questions.

NextGen Healthcare Mirth Connect before version 4.4.1 is vulnerable to unauthenticated remote code execution.
Affected: Mirth Connect (Nextgen). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 7, 2024 and is known to be used in ransomware campaigns.
Yes. It was added on May 20, 2024 with a federal remediation due date of Jun 10, 2024.
Public exploit code is available.
Fixed versions are available, including Mirth Connect 4.4.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2023-43208 Running On Your Attack Surface?

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