A company called Gibson Securities posted a link to the exploit on a tweet that was sent out last week. The company said that it had been trying to warn Snapchat about the exploit for months, but was ignored. The hackers running the SnapchatDB! site might also be trying to send Snapchat a message about tightening its security. They claim that they are sharing this information with the public to raise awareness of the issue.
Snapchat has allegedly turned down offers of $3 billion and $4 billion for the company from Facebook and Google respectively. The messaging app allows users to send text, video and photo messages that disappear after 10 seconds. If you want to see if your username is in the database, click on the sourcelink to get directed to a site where you can check this out.
SnapchatDB! has 4.6 million Snapchat usernames matched up with phone numbers
source: robbiet, SnapchatDB! via Forbes