Parenting website Mumsnet was hit by a Denial Of Service (DOS) attack which made it unavailable for the users.
The attack accessed passwords through a form of phishing and diverted around 17,000 requests per second which were more data than is normal.
Apparently, the hackers had taken control of 11 users' accounts and breached some of the data from the website.
Source: https://www.huffingtonpost.co.uk/2015/08/19/mumsnet-cyber-attack-website-security_n_8008598.html
"id": "MUM225323422",
"linkid": "mumsnet",
"type": "Cyber Attack",
"date": "08/2015",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"