"The explanation for this is that tens of millions of people have become infected by malware, and the malware sent every saved username and password from browsers like Chrome and Firefox back to the hackers from all websites including Twitter," the blog post said.
A Twitter spokesperson said in a prepared statement:"A number of other online services have seen millions of passwords stolen in the past several weeks. We recommend people use a unique, strong password for Twitter. We detail other steps people can take to keep their accounts secure on our help center."
In a recent tweet, the company also said that it periodically checks its data against recent password leaks to ensure that account stay secure.