As mentioned in the article, a Twitter spokesperson says: “We’ve seen no evidence to corroborate this claim, including from the article published in the Netherlands today”
If this is true I'm deeply disappointed in the world's hackers that such a vulnerability on such a target went unexploited for such a long time. However, all that said, I doubt it's true just because I expect someone else would've discovered this long before now.
While this is certainly not impossible, I find it to be highly unlikely. If it's true that Trump's password is this weak then we should have seen account takeovers by now considering there are many people who would love to control that account both for economic reasons (Trump's tweets used to move markets) and political ones.
There would be no point. The information would be immediately disavowed by Trump. If you wanted to usefully manipulate people, you'd need to be a little more subtle.
"Mr. Trump’s account got extra protection after past incidents, according to a senior administration official and a Twitter employee, who would speak only anonymously because the security measures were private."
This guy has cracked Trumps password before. Incredible... I would have expected such a password to be cracked much sooner. Maybe no one is actually trying to get into Trumps twitter account?
White House also denying this story.