More than 40 percent of Chinese websites are exposed to vulnerabilities that may lead to attacks and personal information leakage.

Over 1 million security loopholes on websites were detected in 2015 by Qihoo 360, a Chinese internet security company. That accounted for 43.9 percent of total websites scanned, 13 percent of which had high-risk vulnerability, a report by Qihoo 360 showed.

Only 4.7 percent of security loopholes were fixed. Of those, 10.3 percent were repaired in 24 hours while it took more than a week to fix over half of the others.

The security flaws had led to hacker attacks, mainly directed at domestic IP addresses. Only 4.3 percent of total attacks were aimed at overseas IP addresses.

More than 5.53 billion items of personal information could have been leaked due to vulnerabilities on 1,282 websites, report showed. The leakage rate in the healthcare industry was alarmingly high, with every loophole leading to 9.6 million potential personal information losses.