CVE-2018-9104: Mitel MiVoice Connect

Medium severity, CVSS 6.1. EPSS: 1% chance of exploitation in the next 30 days.

A vulnerability in the conferencing component of Mitel MiVoice Connect, versions R1707-PREM SP1 (21.84.5535.0) and earlier, and Mitel ST 14.2, versions GA27 (19.49.5200.0) and earlier, could allow an unauthenticated attacker to conduct a reflected cross-site scripting (XSS) attack due to insufficient validation for the api.php page. A successful exploit could allow an attacker to execute arbitrary scripts.

Affected products

• Mitel MiVoice Connect: up to and including 21.84.5535.0
• Mitel St 14.2: up to and including 19.49.5200.0

Published 2018-04-25. Last modified 2026-06-17.