Facebook's login system is being hijacked by China's Great Firewall

For the last three days, China's Great Firewall has been intercepting the Javascript module from Facebook Login, which allows third-party sites to authorize users through Facebook infrastructure. First reported on Sunday, the attack causes sites using Facebook Login to redirect to a third-party page for many web users in China. "This behavior is occurring locally and beyond the reach of our servers," a Facebook spokesperson told The Verge. "We are investigating the situation."
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