[sligor]

In what I understand: we don't know for sure, but the suspicions are so high that it more important to act quickly and revert the changes. The community will analyse later what the changes are exactly doing ( less urgent than reverting the changes )

[Sesse__]

We definitely know for sure this was inserted intentionally.

What we don't know for sure is whether Jia Tan (whoever that might be, if it is even a single person) did it on purpose, or if they had their account compromised.