Mirth Connect, an open-source data integration platform used in healthcare organizations, has been found to have a critical remote code execution (RCE) vulnerability, CVE-2023-43208, that can be exploited without authentication. This vulnerability bypasses a previously disclosed RCE flaw (CVE-2023-37679) and affects all Mirth Connect installations, regardless of the Java version. Attackers could exploit this flaw to gain initial access or compromise sensitive healthcare data. A patch has been released in Mirth Connect version 4.4.1. Users are strongly advised to update to this version to mitigate the risk.