Someone else here points out that a MITM to Let's Encrypt could cause you to host someone else's ownership challenge for the domain, thus the attacker could use

Someone else here points out that a MITM to Let's Encrypt could cause you to host someone else's ownership challenge for the domain, thus the attacker could use you to prove the attacker controls your domain name. https://news.ycombinator.com/item?id=10678557 https://news.ycombinator.com/item?id=10678557