A class action lawsuit has been filed against Yahoo! after a data breach exposed the usernames and passwords of more than 400,000 users. Jeff Allan of New Hampshire, the only victim named in the lawsuit, received a fraud alert from his eBay account, for which he used the same credentials as his Yahoo! account. The lawsuit alleges Yahoo! failed to adequately safeguard his and others’ personal information. Of those, less than 5 percent of the Yahoo! accounts had valid passwords, Yahoo! said.”]
Source: https://www.cuinfosecurity.com/yahoo-sued-after-breach-a-5014