Trojan attack whilst in my e bay account

Twice in the past 24 hours , whilst in my e bay account messages Norton 360 flagged up a security threat in RED and high risk. It said "TROJANS.WIFI VIP_117(1)SWP.". This only happened while I was in my e bay messages and at no other time so it must be something to do with e bay?. I phoned e bay and was told that the problem would be passed on to their technical dept but e bay said it was probably just Norton being a bit over protective and nothing to worry about!. I should add that Norton immediately analysed the 2 threats and deleted them . I did a Norton and malware bytes full scan/s with no remaining threats detected. I have read it might be something to do with adobe flash player and I need to install the latest version...any replies would be kindly received.