CVE-2018-5780: Mitel Connect Onsite

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

A vulnerability in the conferencing component of Mitel Connect ONSITE, versions R1711-PREM and earlier, and Mitel ST 14.2, release GA28 and earlier, could allow an unauthenticated attacker to inject PHP code using specially crafted requests to the vnewmeeting.php page. Successful exploit could allow an attacker to execute arbitrary PHP code within the context of the application.

Affected products

• Mitel Connect Onsite: up to and including r1711-prem
• Mitel ST14.2: up to and including ga28

Published 2018-03-14. Last modified 2026-06-17.