Josh Halliday reports:
Facebook has been urged to tighten its privacy settings after a software engineer was able to harvest data about thousands of users – simply by guessing their mobile numbers.
The developer obtained the names, profile pictures and locations of users who had linked their mobile number to their Facebook account but had chosen not to make it public.
Security experts said the loophole would allow hackers to build enormous databases of Facebook users for sale on internet black markets.
Read more on The Guardian.