Your favorite social networks and other popular services might have already patched the vulnerability caused by the Heartbleed bug but there is still a significant chunk of the internet that is still at risk. According to Robert Graham of Errata Security, there are 309,197 systems that are still at risk at the beginning of May. When Heartbleed was discovered in April, Graham discovered that 615,268 websites were at risk. While there are a large number of sites that have been able to patch the vulnerability, there is still that huge number that may or may not even deal with the issue. Graham refused to name the sites because he doesn’t want to make it easier on hackers to get into these systems.
Source: Slate