It looks like shutting down the service isn’t the worst thing to happen to Vine. Vine’s owner Twitter has started sending out a mass email to Vine users alerting them that a “bug,” which they say was “immediately fixed,” briefly let third parties see email addresses and phone numbers linked to Vine accounts. But they don’t make any mention of passwords being compromised. They did want to emphasize the window also lasted “less than 24 hours.”
If you’re notified that means you might have been affected. But it also doesn’t mean that your information has been misused. What Vine warns about is being suspicious of any emails or messages from unknown senders. And reminds its users that “Vine will only send communications from @twitter.com, and we will never send emails with attachments or request your password by email.”
Source: Vine on Medium