The Twitter account of Jack Dorsey, Twitter’s chief executive officer, was recently hacked and briefly hijacked.
According to reports, the breach, which occurred on Friday, may have been caused by a vulnerability that Twitter had previously been warned about and repeatedly denied was a problem.
The account, which has the handle @jack, published a series of public tweets and retweets that included offensive. Twitter quickly acknowledged that someone had hacked the account, and said it was now secure.
The hackers also reportedly posted a hashtag that was used during the apparent hacks of several YouTube stars last week.
The tweets were labeled as posted by Cloudhopper, an SMS company Twitter purchased in 2010, back when some users regularly used text messages to send tweets, according to reports.
The offensive tweets and retweets were deleted less than an hour after the incident. Reports have also noted that some Twitter accounts named in the compromised posts appeared suspended on Friday.
The incident was not the first time that Dorsey’s Twitter account has been compromised. In 2016, his account was taken over by a hacking group known as OurMine Security, which also hacked the Twitter accounts of Google CEO Sundar Pichai, Facebook CEO Mark Zuckerberg and numerous celebrities.