"Companies spend a lot of time, money, resources and defending their servers, but they forget about auxiliary infrastructure that is integrally connected to their networks, like DNS."
Cybersecurity experts said hijacking attacks are preventable if website administrators are meticulous about what code they bring into their sites.
"As this incident illustrates, any time you integrate third-party code into your site, it presents a new attack vector for hackers. You must not only ensure your own code is secure, but you must also rely upon third parties' security practices," said Aaron Titus, a privacy officer and attorney at New York-based privacy software firm Identity Finder.
Michael Fey, a chief technology officer at Santa Clara, California-based cybersecurity firm McAfee, said that as long as media organizations play a critical role as influencers and critics, they will continue to be targets of cyberattacks.
He said the battle tactics are broad, from denial of service attacks, to targeted attacks using social engineering and to deploying information-gathering Trojans.
"Regardless of technology or tactics deployed, we should expect to see more of these attacks," he said.
Associated Press writers Raphael Satter in London, Nick Jesdanun in New York and Rod McGuirk in Canberra, Australia, contributed to this story.