Google Chrome, Mozilla Firefox, and Apple iTunes were the most vulnerable among popular software programs in 2012 according to the newly released 2013 Secunia Vulnerability Review (PDF). That may come as a surprise to anyone who accuses Microsoft of rolling out the most insecure software on the market, but then again, they can point to the fact that 29 of the top 50 most vulnerable programs for 2013 bore the Microsoft logo.