Most but not all sites have fixed Heartbleed flaw

The world’s top 1,000 websites have been patched to protect their servers against the “Heartbleed” exploit, but up to 2% of the top million were still vulnerable as of last week, according to a California security firm.

On Thursday, Menifee, Calif.-based Sucuri Security scanned the top 1 million websites as ranked by Alexa Internet, a subsidiary of Amazon that collects Web traffic data.