SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi Controller version <= 5.10.21 and their actual SMTP server to record their SMTP credentials for malicious use later.
[
{
"product": "UniFi",
"vendor": "UniFi",
"versions": [
{
"status": "affected",
"version": "<= 5.10.21"
}
]
}
]