A Romanian bug hunter has discovered a "blended threat" targeting Yahoo's Developer Network Web site that allows unauthorized access to Yahoo users' emails and private profile data.At a security conference Sunday, Sergiu Dragos Bogdan demonstrated an abbreviated version of an attack using the YQL console on developer.yahoo.com. Yahoo Query Language is the company's proprietary programming language and used to test queries against Yahoo databases. Authenticated users also can access tables with their own Yahoo account data, such as e-mails and profile data, to mount queries.According to Computerworld, Bogdan showed how an attacker could abuse