Researchers at Malwarebytes, an anti-malware vendor, uncovered a large scale attack targeting Yahoo customers via Yahoo’s advertising network. Malwarebytes notified Yahoo about it and the “malvertising” marketing campaign is now no longer in progress. The attack was possible as a result of Flash vulnerabilities in unpatched versions of Flash, even perhaps the same vulnerabilities that

Source: Users of Yahoo hacked because of Flash – GadgTecs