A hacker’s claim that he compromised the successor to President Obama’s campaign Web site appears to be a hoax, according to information that surfaced since the matter came to light early Monday. The kerfuffle started when a hacker and blogger with a history of posting evidence of security vulnerabilities in popular and high-traffic Web sites published evidence indicating that poor security at barackobama.com had exposed internal databases at the site. The hacker, identified only as “Unu,” claimed that a security flaw in barackobama.com allows anyone to view the user names and passwords needed to administer the site. With that access, an attacker could view database information, upload content to the site – including malicious software – or simply deface the landing page with digital graffiti. Barackobama.com is now managed by the Democratic National Committee’s Organizing for America. Hari Sevugan, national press secretary for the DNC, dismissed the claim, and said