i think its very dangerous it had started out with facebook do a google search, its a worm and yes its dangerous
I think this is a very old issue related to java apparently in can infect your computer as well as websites inserting this not only to JavaScript but anything writable in a text file which contains codes. clean it by a virus scanner by downloading your file or do a Google search for same I don’t remember when this happened surely 5 years ago maybe and Google was warning everyone then of this. i am not sure of the solution but this is a worm.
