뭔 영어메일이 하나 와있길래 스팸인가싶어 지우려다가 봤더니 메일주소는 맞는거같아 

(파파고에게 번역 시켜서) 읽어보니 대강 "고쳤음. 아무튼 님 스팀계정은 안전함. 유감임" 이라는데요 

제 스팀계정은 소중하니깐 로그인방식은 일단 바꿔놨습니다.

메일 전문은 이렇습니다.

Hello,

I'm writing you to disclose a Steam login vulnerability on our website that we have been notified about and already fixed.

The vulnerability allowed attacker to spoof login via Steam and access any account that was using Steam Single Sign-on on IsThereAnyDeal.
Attacker could be able to access only your ITAD account, your Steam account is safe!

We have no evidence that any of your accounts were accessed this way, we believe only admin accounts were targeted.

Although the issue is fixed, if you would like to switch from Steam Single Sign-On to email and password login, you can do that at any time in your settings:
https://isthereanydeal.com/settings/account/

I am very sorry about this and we will do everything in our power to prevent any other future vulnerability.

Best regards,
Tomas