The Yahoo! Contributors Network (contributor.yahoo.com) is vulnerable to a Time based Blind SQL Injection vulnerability. The vulnerability flaw was reported to Yahoo! Security team a few months ago and the company fixed the flaw. Yahoo! announced its decision to shut down Yahoo Contributors network due to its decreasing popularity and removed all its contents online, except some of the work for hire content. In July 2012, hackers called D33DS Company published 453,491 email addresses and passwords in a document named Owned and Exposed.”]
Source: https://securityaffairs.co/wordpress/29047/hacking/yahoo-contributors-network-flaw.html