WASHINGTON — The Twitter and YouTube accounts of the US Central Command were easy to hack because the military was using simple passwords, a senior administration official said Tuesday.

“Obviously this incident continues to point to the need to increase cybersecurity across the board,” said the official, who briefed reporters on new cybersecurity proposals from the White House.

The official did not disclose the passwords, which were quickly changed after hackers claiming to be affiliated with ISIS terrorists took over the accounts and threatened military personnel.