SAN FRANCISCO — Meta won a legal victory Wednesday against a former employee who published an explosive, tell-all memoir, as an arbitrator temporarily prohibited the author from promoting or further distributing copies.

Sarah Wynn-Williams last week released “Careless People: A Cautionary Tale of Power, Greed, and Lost Idealism,” a book that describes a series of incendiary allegations of sexual harassment and other inappropriate behavior by senior executives during her tenure at the company. Meta pursued arbitration, arguing that the book is prohibited under a nondisparagement contract she signed as a global affairs employee.

During an emergency hearing Wednesday, the arbitrator, Nicholas Gowen, found that Meta had provided enough grounds that Wynn-Williams had potentially violated her contract, according to a legal filing posted by Meta.

The two parties will now begin private arbitration.

In addition to halting book promotions and sales, Wynn-Williams must refrain from engaging in or “amplifying any further disparaging, critical or otherwise detrimental comments,” according to the filing. She also must retract all previous disparaging comments “to the extent within her control.”

The filing did not appear to limit the publisher, Flatiron Books, or its parent company, Macmillan, from continuing publication of the memoir.

Meta has vehemently denied the allegations in the book.

The book is a “mix of out-of-date and previously reported claims about the company and false accusations about our executives,” a Meta spokesperson, Andy Stone, said in a statement. Wynn-Williams was fired for poor performance, he added, and an investigation at the time determined that “she made misleading and unfounded allegations of harassment.”

A spokesperson for Wynn-Williams, who worked at what was then called Facebook from 2011 to 2017, did not comment.