Around 4,50,000 Yahoo users’ email addresses and passwords have been leaked because of a security breach. The company said in a statement that an “old file” from the Yahoo Contributor Network, a content-sharing platform, was compromised Wednesday. Among the stolen emails and passwords were many from Yahoo’s own email service along with those of other companies.
Yahoo said it is fixing the vulnerability that led to the disclosure, changing the passwords of affected Yahoo users, and notifying other companies whose users’ accounts may have been compromised. However, Yahoo said that only 5 percent of passwords associated with its account holders were valid.
The hackers behind the attack have been identified as the D33D Company. The group was quoted as saying it had stolen the unencrypted passwords using an SQL injection — using rogue commands to extract data from vulnerable websites.