JB Hi-Fi's website was redirecting customers to malicious web pages over the weekend in a cyber attack that appears to have affected several other Australian websites in the lead-up to Christmas.

The exact details of the attack are not yet clear as the retailer has refused to comment but users first started reporting problems on Friday night.

Visitors to jbhifi.com.au reported being automatically redirected to Chinese websites carrying malware. Similar issues affected JB Hi-Fi's New Zealand website, which is hosted on the same server.



Those with anti-virus software and fully patched internet browsers would have been alerted to the security issue upon visiting the page but people without up-to-date protection could be infected without even knowing.

Separately, one of the most popular Australian online communities for computer enthusiasts, Overclockers Australia, has been offline for several days due to technical issues. The site last week asked users to change their passwords due to a security scare.