A vulnerability in the conferencing component of Mitel MiVoice Connect through 19.3 SP2 and 20.x, 21.x, and 22.x through 22.24.1500.0 could allow an unauthenticated attacker to conduct a reflected cross-site scripting (XSS) attack due to insufficient validation for the home.php page. A successful exploit could allow an attacker to execute arbitrary scripts.