TripAdvisor advertises itself as the -¬---most trusted-¬~ site but has recently fallen victim to hackers.
An email sent to members from the website's CEO Steve Kaufer said hackers had managed to get hold of a "proportion" of its members list.
He reassured them that the source of the "vulnerability" had been found and shut off.
All member passwords are secure, said Kaufer.
SC Magazine, a publication for security professionals, said TripAdvisor had told members it was taking the incident very seriously and had contacted law enforcement officials.
The incident was discovered over the weekend of March 19.
The review website did not reveal how many of its users were affected.
TripAdvisor's website says it has 20 million members.
By David Wilkening, TravelMole USA
Thursday, March 31, 2011
In 2010 Green Globe Certification established a partnership with the Club Med group, to guide and improve their sustainability performance.
Club Med is the only all-inclusive resort chain to have 40 properties Green Globe certified in 20 countries.
For more information about Club Med's sustainability activities, click on the Sustainable Development tab at www.clubmed-corporate.com