If someone tells you private information about his business or any personal matter, you are forbidden to disclose it to others. Your doing so could cause the person who confided in you financial loss, embarrassment, or other damage. Even if the speaker did not request that the matter remain secret, you are not allowed to repeat it. It is self-evident that the speaker does not want such information to be divulged.

However, if that person related information concerning himself in the presence of three or more people and did not request secrecy, they are permitted to relate it to others. Since the speaker related it to a group of three or more people, we can assume that he does not mind if the information will be known. ~ Guard Your Tongue