Yahoo closes security hole that led to password breach

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Yahoo said Friday that it has fixed a security vulnerability that allowed hackers to seize roughly 450,000 unencrypted email addresses and passwords belonging to members of its content-sharing platform.

In a blog post, the web giant said the intruders accessed a “standalone file” that contained the login data used by writers who joined Associated Content  prior to May 2010, the month when Yahoo acquired the company for $100 million. Now called Yahoo Contributor Network, the business unit specializes in producing freelancer-generated, search-optimized content.

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