An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization).

It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire).

As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks.

Mitel MiCloud Management Portal before 6.1 SP5 could allow an attacker, by sending a crafted request, to retrieve sensitive information due to insufficient access control.

Mitel MiCloud Management Portal before 6.1 SP5 could allow an attacker, by sending a crafted request, to view system information due to insufficient output sanitization.

Mitel MiCloud Management Portal before 6.1 SP5 could allow a remote attacker to conduct a SQL Injection attack and access user credentials due to improper input validation.

Mitel MiCloud Management Portal before 6.1 SP5 could allow an unauthenticated attacker to execute arbitrary scripts due to insufficient input validation, aka XSS. A successful exploit could allow an attacker to gain access to a user session.