A hacker broke into 49 House Web sites of both political parties overnight to post a crude attack on President Barack Obama.
Spokesman Jeff Ventura in the chief administrative office said Thursday the sites that were hit were managed by a third-party vendor. In contrast, most lawmakers' Web sites are managed by House technicians.
Ventura says the vendor was performing an update and for a brief moment let its guard down. That was long enough to allow the hacker to penetrate the sites.
The attacker used an obscenity in referring to the president, who gave his state of the union address from the House chamber Wednesday night.