It seems Yahoo has landed itself in trouble again. The company has reportedly been sending out emails to warn users that state-sponsored attackers might have breached their accounts. The hackers purportedly relied on a sophisticated cookie forging exploit that could be executed without the need to acquire user passwords, ZDNet reports. The announcement follows a series of high-profile breaches Yahoo reported last year. Last September the Sunnyvale giant revealed it had suffered a massive attack affecting more than half a million users; then three months later, it came forward with another major breach putting over a billion users at risk. The magnitude of the latest…

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