A vulnerability in the web conferencing component of Mitel MiCollab through 9.6.2.9 could allow an unauthenticated attacker to download a shared file via a crafted request - including the exact path and filename - due to improper authentication control. A successful exploit could allow access to sensitive information.
https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-23-0002