According reporting by The Hill, several lawmaker Web sites, allegedly running open source software, were hacked following President Obama's State of the Union speech last night.
GovTrends is the company that manages about 100 Congress member Web sites, reported The Hill.
"All our services are heavily built on open source platforms. Open source is a development method for building powerful Web applications with the promise of better security," according to the GovTrends Web site.
The Hill's Jordy Yager reports that as "of mid-morning Thursday, several websites were down for maintenance, including those of Reps. Joe Wilson (R-S.C.), Duncan Hunter (R-Calif.), Harry Mitchell (D-Ariz.), Jesse Jackson Jr. (D-Ill.), Spencer Bachus (R-Ala.), Mike Honda (D-Calif.) and Brian Baird (D-Wash.).
It was unclear how many sites had been affected by hackers and how many had been taken down for maintenance as a precaution."
GovTrends found Ab Emam was unavailable for comment.