Media playback is unsupported on your device

Heartbleed hacks hit Mumsnet and Canada's tax agency

15 April 2014 Last updated at 06:30 BST

A leading UK site for parents and the Canadian tax authority have both announced they have had data stolen by hackers exploiting the Heartbleed bug.

Mumsnet, which says it has 1.5 million registered members, said that it believed that the cyber thieves may have obtained passwords and personal messages before it patched its site.

The Canada Revenue Agency said that 900 people's social insurance numbers had been stolen.

Rory Cellan-Jones reports.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.