{"id":"CVE-2023-43208","kind":"vulnerability","aliases":["CVE-2023-43208"],"related":[],"title":"nextgen mirth connect: NextGen Healthcare Mirth Connect before version 4.4.1 is vulnerable to unauthenticated remote code execution","description":"NextGen Healthcare Mirth Connect contains a deserialization of untrusted data vulnerability that allows for unauthenticated remote code execution via a specially crafted request.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"NextGen Healthcare Mirth Connect, a healthcare integration engine, has an unsafe deserialization flaw that lets an unauthenticated remote attacker send a crafted request. The attacker can run code on the server, and CISA lists it as actively exploited with ransomware use.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2024-05-20T00:00:00+00:00","products":[{"name":"NextGen Healthcare Mirth Connect","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"nextgen mirth connect","fixed":["4.4.1"],"affected":"< 4.4.1","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","healthcare","mirth-connect","package","ransomware","self-hosted"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the vendor mitigation or upgrade per NextGen guidance; CISA says to discontinue use if no mitigation is available.","status":"open","published_at":"2023-10-26T17:15:09+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:00:40+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-10-23T21:00:40Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor mitigation or upgrade per NextGen guidance; CISA says to discontinue use if no mitigation is available.\nunknown","reach":"internet","impact":"high","summary":"NextGen Healthcare Mirth Connect, a healthcare integration engine, has an unsafe deserialization flaw that lets an unauthenticated remote attacker send a crafted request. The attacker can run code on the server, and CISA lists it as actively exploited with ransomware use.","category":"package","who_cares":["mirth-connect","healthcare","self-hosted"],"confidence":0.8,"needs_auth":"no","worst_case":"unauthenticated attacker runs code on the Mirth server","analyst_note":"Find the NextGen advisory and the fixed/affected version range, and a check for the vulnerable Mirth Connect version or exposed admin/API port; sources do not give these.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000474,"input_tokens":2851,"output_tokens":378,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':19A,22A '-43208':20A,23A '4.4.1':10A 'action':107C 'activ':77B 'allow':94C 'appli':108C 'attack':59B,65B 'cisa':73B,105C 'code':16A,68B,98C 'connect':3A,7A,27A,30A,35B,44B,85C 'contain':86C 'craft':62B,103C 'cve':18A,21A 'data':91C 'deseri':52B,88C 'discontinu':114C 'engin':48B 'execut':17A,99C 'exploit':31B,78B 'flaw':53B 'healthcar':5A,32B,42B,46B,83C 'healthcare':25A 'host':40B 'instruct':112C 'integr':47B 'let':55B 'list':74B 'mirth':2A,6A,26A,29A,34B,43B,84C 'mirth-connect':33B 'mitig':109C,120C 'nextgen':1A,4A,24A,28A,41B,82C 'packag':36B 'per':110C 'product':118C 'ransomwar':37B,80B 'remot':15A,58B,97C 'request':63B,104C 'requir':106C 'run':67B 'self':39B 'self-host':38B 'send':60B 'server':71B 'special':102C 'unauthent':14A,57B,96C 'unavail':122C 'unsaf':51B 'untrust':90C 'use':81B,115C 'vendor':111C 'version':9A 'via':100C 'vulner':12A,92C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-10-26T17:15:09+00:00","kev":{"dateAdded":"2024-05-20","dueDate":"2024-06-10","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-43208","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-43208","severity":null,"published_at":"2024-05-20T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T14:39:39+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-43208","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-43208","severity":null,"published_at":"2023-10-26T17:15:09+00:00","modified_at":"2026-06-17T06:25:15+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}