CVE-2023-43208

CRITICAL KEV RANSOMWARE NUCLEI

NextGen Healthcare Mirth Connect <4.4.1 - RCE

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2023-43208 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added May 20, 2024, with confirmed use in ransomware campaigns. EIP tracks 15 public exploits from researchers including K3ysTr0K3R, jakabakos, Avento. A Nuclei detection template is also available.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2023-43208, targeting Mirth Connect versions below 4.4.1. The exploit leverages deserialization via a crafted XML payload to achieve remote code execution (RCE) by chaining Apache Commons Collections transformers.

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.

Exploits (15)

nomisec WORKING POC 23 stars
by K3ysTr0K3R · remote
https://github.com/K3ysTr0K3R/CVE-2023-43208-EXPLOIT

This repository contains a functional exploit for CVE-2023-43208, targeting Mirth Connect versions below 4.4.1. The exploit leverages deserialization via a crafted XML payload to achieve remote code execution (RCE) by chaining Apache Commons Collections transformers.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mirth Connect < 4.4.1
No auth needed
Prerequisites: Network access to the target Mirth Connect instance · Target must be running a vulnerable version (< 4.4.1)
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 3 stars
by jakabakos · remote
https://github.com/jakabakos/CVE-2023-43208-mirth-connect-rce-poc

The repository contains functional exploit code for CVE-2023-43208, a pre-authentication RCE vulnerability in Nextgen's Mirth Connect. The exploit leverages deserialization via a crafted XML payload to execute arbitrary commands on the target system.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Nextgen Mirth Connect (versions up to 4.4.0)
No auth needed
Prerequisites: Network access to the target Mirth Connect instance · Target must be running a vulnerable version of Mirth Connect
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 2 stars
by Avento · infoleak
https://github.com/Avento/CVE-2023-43208_Detection_PoC

This repository contains a functional exploit PoC for CVE-2023-43208, leveraging Java deserialization via a crafted XML payload to trigger DNS lookups to an attacker-controlled domain (oast.fun). The payload uses Apache Commons Collections and Commons Lang to construct a gadget chain that invokes `java.net.InetAddress.getAllByName`.

Classification
Working Poc 95%
Attack Type
Deserialization
Complexity
Moderate
Reliability
Reliable
Target: Systems using vulnerable versions of Apache Commons Collections and Commons Lang with XML deserialization
No auth needed
Prerequisites: Vulnerable version of Apache Commons Collections/Commons Lang · XML deserialization endpoint
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 1 stars
by Criz117 · poc
https://github.com/Criz117/CVE-2023-43208-PoC

This repository contains a functional exploit for CVE-2023-43208, an unauthenticated RCE vulnerability in Mirth Connect < 4.4.1. The exploit leverages a deserialization flaw via a crafted XML payload to execute arbitrary commands, including reverse shells.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mirth Connect < 4.4.1
No auth needed
Prerequisites: Python 3.11+ · requests library · network access to target
devstral-2 · analyzed Mar 14, 2026 Full analysis →
nomisec WORKING POC 1 stars
by predyy · remote
https://github.com/predyy/CVE-2023-43208

This repository contains a functional Python exploit for CVE-2023-43208, targeting Mirth Connect versions below 4.4.1. The exploit leverages deserialization via a crafted XML payload to achieve remote code execution (RCE).

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mirth Connect < 4.4.1
No auth needed
Prerequisites: Network access to the target · Mirth Connect instance running a vulnerable version
devstral-2 · analyzed Feb 25, 2026 Full analysis →
nomisec WORKING POC 1 stars
by kyakei · remote
https://github.com/kyakei/CVE-2023-43208

This repository contains a functional exploit for CVE-2023-43208, a pre-authenticated remote code execution vulnerability in NextGen Healthcare Mirth Connect < 4.4.1. The exploit leverages an XStream deserialization bypass using Apache Commons Lang3 and Commons Collections4 gadgets to achieve command execution.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: NextGen Healthcare Mirth Connect < 4.4.1
No auth needed
Prerequisites: Python 3.10+ · requests library · network access to target
devstral-2 · analyzed Feb 22, 2026 Full analysis →
nomisec WRITEUP
by ledksv · poc
https://github.com/ledksv/Interpreter-HackTheBox

This is a detailed technical writeup for CVE-2023-43208, covering the exploitation of an unauthenticated Java deserialization vulnerability in Mirth Connect 4.4.0, followed by privilege escalation via an unvalidated `eval()` call in a Python service. The writeup includes specific technical details such as API endpoints, payload construction, and post-exploitation steps.

Classification
Writeup 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mirth Connect 4.4.0
No auth needed
Prerequisites: Network access to the target · Mirth Connect 4.4.0 exposed over HTTP/HTTPS
devstral-2 · analyzed May 16, 2026 Full analysis →
nomisec WORKING POC
by Humberto-pixel · remote
https://github.com/Humberto-pixel/CVE-2023-43208-PoC

This repository contains a functional exploit for CVE-2023-43208, targeting a deserialization vulnerability in Mirth Connect. The exploit constructs a malicious XML payload using Apache Commons Collections gadgets to achieve remote code execution via a reverse shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mirth Connect (versions before 4.4.1)
No auth needed
Prerequisites: network connectivity to target · listener setup for reverse shell
devstral-2 · analyzed Apr 10, 2026 Full analysis →
nomisec WORKING POC
by LunaLynx12 · remote
https://github.com/LunaLynx12/cve-2023-43208-poc

This repository contains a functional Python exploit for CVE-2023-43208, targeting Mirth Connect via a pre-authentication deserialization vulnerability. The exploit constructs a malicious XML payload using XStream gadget chains to achieve remote code execution (RCE) on the target system.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mirth Connect
No auth needed
Prerequisites: Python 3.9+ · requests library · urllib3 library · target URL · command to execute
devstral-2 · analyzed Mar 13, 2026 Full analysis →
nomisec WORKING POC
by 4nuxd · remote
https://github.com/4nuxd/CVE-2023-43208

This repository contains a functional exploit for CVE-2023-43208, targeting Mirth Connect versions below 4.4.1. The exploit automates dependency installation, detects vulnerable instances, and establishes a reverse shell via a crafted XML payload.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mirth Connect < 4.4.1
No auth needed
Prerequisites: network access to target · open listener port for reverse shell
devstral-2 · analyzed Mar 12, 2026 Full analysis →
nomisec WORKING POC
by az4rvs · remote
https://github.com/az4rvs/Mirth-Connect-CVE-2023-43208

This repository contains a functional exploit for CVE-2023-43208, leveraging a deserialization vulnerability in Mirth Connect's XStream engine to achieve unauthenticated remote code execution. The exploit constructs a malicious payload using Apache Commons Collections gadgets to execute a reverse shell.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: NextGen Mirth Connect < 4.4.1
No auth needed
Prerequisites: Network access to the target · Attacker-controlled host to receive the reverse shell
devstral-2 · analyzed Feb 27, 2026 Full analysis →
nomisec WORKING POC
by D3m0nicw0lf · remote
https://github.com/D3m0nicw0lf/CVE-2023-43208

This repository contains a functional exploit for CVE-2023-43208, targeting Nextgen's Mirth Connect. The exploit leverages deserialization of malicious XML payloads to achieve pre-authentication remote code execution (RCE) via a crafted HTTP request to the `/api/users` endpoint.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Nextgen Mirth Connect (versions up to 4.4.0)
No auth needed
Prerequisites: Network access to the target Mirth Connect instance · Vulnerable version of Mirth Connect (≤ 4.4.0)
devstral-2 · analyzed Feb 25, 2026 Full analysis →
nomisec WORKING POC
by MKIRAHMET · remote
https://github.com/MKIRAHMET/PoC-2023-43208

This repository contains a functional exploit for CVE-2023-43208, targeting Mirth Connect with a deserialization attack leading to RCE. The PoC includes version detection, payload generation, and interactive user input for target configuration.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mirth Connect < 4.4.1
No auth needed
Prerequisites: network access to target · listener setup for reverse shell
devstral-2 · analyzed Feb 25, 2026 Full analysis →
nomisec WORKING POC
by Pegasus0xx · remote
https://github.com/Pegasus0xx/CVE-2023-43208

This repository contains a functional exploit for CVE-2023-43208, targeting Mirth Connect <= 4.4.0 via XStream deserialization. The exploit constructs a malicious payload to achieve remote code execution (RCE) by leveraging a deserialization vulnerability in the application.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mirth Connect <= 4.4.0
No auth needed
Prerequisites: network access to target · target running vulnerable version of Mirth Connect
devstral-2 · analyzed Feb 23, 2026 Full analysis →
nomisec SCANNER
by J4F9S5D2Q7 · poc
https://github.com/J4F9S5D2Q7/CVE-2023-43208-MIRTHCONNECT

The repository contains a bash script that scans for Mirth Connect instances vulnerable to CVE-2023-43208 by checking for specific HTTP response headers. It does not include exploit code but identifies potentially vulnerable targets.

Classification
Scanner 90%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: NextGen Healthcare Mirth Connect before 4.4.1
No auth needed
Prerequisites: List of target hosts in a file named 'hosts'
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Nuclei Templates (1)

NextGen Healthcare Mirth Connect - Remote Code Execution
CRITICALby princechaddha
Shodan: title:"mirth connect administrator" || http.title:"mirth connect administrator"
FOFA: title="mirth connect administrator"

Scores

CVSS v3 9.8
EPSS 0.9442
EPSS Percentile 100.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable yes
Technical Impact total

Details

CISA KEV 2024-05-20
VulnCheck KEV 2024-03-07
InTheWild.io 2024-05-20
ENISA EUVD EUVD-2023-47627
Ransomware Use Confirmed
CWE
CWE-78 CWE-502
Status published
Products (1)
nextgen/mirth_connect < 4.4.1
Published Oct 26, 2023
KEV Added May 20, 2024
Tracked Since Feb 18, 2026