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Travel website TripAdvisor has warned some customers they might receive spam after email details were stolen by hackers from its site.
It has been a hectic seven days on the security front with RSA's servers being breached, Play.com having to admit customer records had been hacked and now the TripAdvisor admission.
The travel specialist posted a warning on its website over the breach: "We discovered that an unauthorised third party has recently stolen part of TripAdvisor's member email list."
It added that it had, "identified the vulnerability, shut it down and are vigorously pursuing the matter with law enforcement."
But the attack comes just a couple of days after Play.com saw one of its third-party marketing suppliers hit by hackers and has raised the fears that customer emails are becoming increasingly vulnerable.
"Even though no passwords appear to have been stolen most people will not cheer at the prospect of even more Spam," said Paul Vlissidis, technical director at NGS Secure, part of NCC Group.
But he added that there was likely to be some implications for TripAdvisor following the attack.
"Individuals place trust in sharing their data via a website and this trust is often linked to the brand. Well known brands, such as this, being hacked undermines that trust," he said.