Google said on Monday that it is accelerating the closure of the consumer version of its social network Google+ after a new bug was found that may have put private data of over 500,000 users at risk.

Google decided to "sunset" the already little-used Google+ service and its APIs four months earlier than previously announced, because the company determined that "some users were impacted by a software update introduced in November that contained a bug affecting a Google+ API."

The bug was discovered during a standard checkup procedure and fixed within one week, the California-based company said.

"No third party compromised our systems, and we have no evidence that the app developers, that inadvertently had this access for six days, were aware of it or misused it in any way," it added.

Google will suspend Google+ APIs within 90 days and brought the shutdown date of consumer Google+ from August to April 2019.

Google said the new vulnerability impacted 52.5 million users, who could have exposed to developers their profile information such as username, e-mail address, age, and occupation.

A similar Google+ vulnerability was disclosed in October, which left its users' private and other sensitive information exposed to developers for three years, triggering widespread concern about the internet company's handling of users' data and its transparency policy.

Google later announced plans to phase out the consumer version of Google+ service for good.