A hack that compromised Gawker's commenting system this weekend has also led to a Twitter spam attack, both companies confirmed Monday.

There were reports this morning of a Twitter worm spreading through the site via tweets that discussed the "acai berry." Twitter said later on its @security feed that the incident was actually a spam attack related to a Gawker hack rather than a worm. Twitter and Gawker warned those who used the same password for the Gawker commenting system and Twitter to change those passwords immediately.

"Current attack appears to be due to the Gawker compromise," Twitter tweeted this morning. "In other words: the 'acai berry' spam attack looks to be connected w/ the Gawker hack rather than a worm."

Over the weekend, a hacker accessed Gawker's commentor database, which is home to about 1.5 million usernames, e-mails, and passwords. "The passwords were encrypted. But simple ones may be vulnerable to a brute-force attack You should change the password on Gawker (GED/commenting system) and on any other sites on which you've used the same passwords," Gawker said in a statement. "Out of an abundance of caution, you should also change your company email password and any passwords that might have appeared in your email messages."

In a FAQ posted Sunday night, Gawker said the password issue affects sites beyond Twitter. "If you used your Gawker Media password on any other web site, you should change the password on those sites as well, particularly if you used the same username or email with that site," the company said. "To be safe, however, you should change the password on those accounts whether or not you were using the same username."

Gawker said it does not store the passwords of those who signed into Gawker via Facebook Connect or Twitter. There is currently no option to delete your Gawker account, though the company said it will provide that feature in the future.

Who hacked Gawker? The site pointed to a post from TheNextWeb that said a group calling itself Gnosis has claimed credit for hacking Gawker's servers. The group "wanted to seemingly put Gawker back in its place, creating a 500MB torrent file, currently residing on the popular torrent tracker ThePirateBay," the blog said.