More: http://news.softpedia.com/news/vbul...letin-website-and-foxit-software-495620.shtml (2. November, 2015)Hacker Coldroot claims responsibility for the attack
It appears that a zero-day vulnerability in the vBulletin forum package allowed an Egyptian hacker to breach the official vBulletin website and the forums of Foxit Software, which was using vBulletin for its forum section.
The hacker is Mohamed Osama who, as soon as he pulled off the attack, started bragging to @Cyber_War_News on Twitter.
vBulletin is the most common commercial forum software on the Internet, though its market share has been plummeting in recent years. It's used by big sites like mothering.com, MoneySavingExpert, DigitalSpy, TheStudentRoom, and of particular interest to members here: VB.
If a hacker can break into vBulletin.com itself, then one must assume all sites running vBulletin software are at risk. If you have an account at any of these sites and it's using your favourite password, then it might not be such a good password any more.