Facebook founder Mark Zuckerberg and two of his top execs were among the 50 million users of the social media site whose accounts have been hacked.

近日，脸书5000万用户的账户遭到攻击，而该社交网站的创始人马克·扎克伯格和他的两名高管也身在其中。

"This is a really serious security issue, and we're taking it seriously," Zuckerberg said. "We need to be more proactive."

扎克伯格表示：“这的确是一起极其严重的安全事件，我们要认真对待。我们应当更加具有前瞻性。”

The social-media giant determined that hackers had "exploited a vulnerability in Facebook's code" that allowed them to take over users' accounts, it said in a blog post.

该社交媒体巨头在一篇博客帖子中写道，他们认为黑客是利用了脸书代码中的某一漏洞，使得他们可以接管用户的账户。

Other hacking victims include Facebook's chief operating officer, Sheryl Sandberg, and its European vice-president, Nicola Mendelsohn.

其他遭受黑客攻击的人还包括脸书网的首席运营官谢丽尔·桑德伯格和欧洲地区副总裁尼古拉·门德尔松。

Hours after the hack was revealed, a class action suit was filed against Facebook by users Carla Echavarria of California and Derrick Walker of Virginia.

在黑客攻击事件曝光数小时后，加州用户卡拉·埃查瓦里亚和弗吉尼亚州用户德里克·沃克对脸书提起了集体诉讼。

Some speculated it could turn out to be the biggest such suit ever filed.

一些人猜测，这可能是有史以来规模最大的此类诉讼。