TechCrunch compromised by security exploit

Popular technology blog TechCrunch was compromised earlier today and their site was replaced by a message that links to a website offering assorted links to pirated material:

At the time of writing this, those responsible of the TechCrunch website have removed the defacement and are working on restoring the regular blog. The message currently reads:

Details of this attack are still unknown but TechCruch will probably share information once their site is back up.

Update: 4:25 AM EST TechCrunch is back online, details are still lacking but their message is as follows: