Yahoo appears to have been the victim of a security breach that yielded more than 400,000 login credentials stored in plain text.
The hacked data, posted to hacker site D33D Company, contained more than 453,000 login credentials and appears to have originated from the Web pioneer's network. The hackers, which said they used a union-based SQL injection technique to penetrate the Yahoo subdomain, said the data dump was intended to be a "wake-up call."
CNET Source
Sensitive Data Warning : (Visit only if you think you're at risk!)
Code:
hxxp://d33ds .co.nyud.net/archive/yahoo-disclosure.txt
Formspring has suffered a security intrusion in which some of its user passwords may have been breached, the question-and-answer site warned today.
Formspring, which said it only learned of the network intrusion this morning, responded by disabling all users' passwords.
CNET Source
You may have recieved an email on informing you to change your password