Yahoo seems to be the most major Web to site have been vulnerable to the bug (preliminary tests for Facebook, Google, and Twitter's Web sites said they appear to be safe). The company said that it has "successfully made appropriate corrections" to the main Yahoo properties: Yahoo Homepage, Search, Mail, Finance, Sports, Food, Tech, Flickr and Tumblr. Still, a Yahoo spokesperson said the company is still working to make the fix across the rest of the Yahoo sites.