CVE-2018-12901: Mitel St Firmware

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

A vulnerability in the conferencing component of Mitel ST 14.2, versions GA29 (19.49.9400.0) and earlier, could allow an unauthenticated attacker to conduct a reflected cross-site scripting (XSS) attack due to insufficient validation for the signin.php page. A successful exploit could allow an attacker to execute arbitrary scripts.

Affected products

• Mitel St Firmware: before 19.49.9400.0 (fixed in 19.49.9400.0)

Published 2018-10-23. Last modified 2026-06-17.