ps. the biggest problem I see is the fact, that I couldn't find any informations on dlease.io which could point me in right direction and help me figure out why does my account upvote theirs.
This is because the upvotes are not related to dlease.io and the information is under to upvoted post itself.
I think it is impossible to provide enough information that someone in a panic state of "I AM HACKED!!!!!11eleven" will be able to find out why it happened.