Unless there was a clause written into the contract indicating that there would be severe financial and legal reperucussions if the contents were ever shared with a third party.
Certainly not unheard of. In the contracts employees sign with Harpo Inc, they are forbidden from discussing any aspects of its business in a public way for the rest of there lives, regardless of if they remain with the corporation or not. Elizabeth Cody tested the stipulation in court and lost to Oprah and her army of lawyers.