Nov 05, 2013 10:29 AM EST By Jaleesa Baulkman, UniversityHerald Reporter

A limousine software company has been hacked, exposing the personal and financial information of more than 850,000 of their clientele, which includes politicians, star athletes and corporate executives, the Associated Press reported.

Chief Information Security Officer of Milwaukee-based Hold Security Alex Holden discovered the breach at Corporate Car Online more than a month ago. Credit card numbers and potentially embarrassing details of the company's affluent customers such as Lebron James and Tom Hanks have been exposed.

"The privacy implications of this are very disturbing," Holden told the AP.

Corporate Car Online is a company based out of Kirkwood, Miss. that car services buy software from and use to streamline reservations, dispatching and payments.

Cyber security blogger Brian Krebs reported the hack on his website on Monday.

"I reached out several times over almost two weeks seeking comment from CorporateCarOnline.com," Krebs wrote. "At length, I reached owner Dan Leonard, who seemed to know what I was calling about, but declined to discuss the matter, saying only that 'I'd prefer not to talk to anybody about that.'"

According to Krebs, more than 241,000 of the compromised credit card numbers were high- or no-limit American Express accounts, card numbers that have very high resale value in the cybercrime underground.

In his report he included "details dispatchers gave to drivers heading out to pick up celebrity passengers," the AP reported. Addresses to the places some of the celebrities' destinations were also revealed.

For example, Krebs reported a chauffeur driving Hanks to a Chicago restaurant for dinner on June 13. He said Hanks demands included no cell phone or radio use by the driver.

"Other customers include Donald Trump, who required a new car with a clear front seat; LeBron James, who was picked up at an entrance for athletes at a Las Vegas sports arena; and Colorado Sen. Mark Udall, who was traveling to Boston with golf clubs," the AP reported.

The stolen files also include records about what took place in the vehicles, including sex, vomiting and smoking marijuana, Krebs reported.

Holden found the information from Corporate Car Online customers stored on the same computer server where he earlier found stolen usernames and passwords from PR Newswire, Adobe Systems and about 100 other firms, the AP reported.

Adobe and PR Newswire took immediate action when they learned of the breach and alerted the public, warning millions of customers affected. Holden told the AP said he contacted credit card companies himself because he was concerned that Corporate Car was failing to act. Corporate Car Online's website claims they have strong data protection.

"The only point of access to the servers is through our firewall, which is managed by our data center ... 365 days a year," according to the website.

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