The company makes software that records every call and SMS made from a mobile phone, but a flaw in the company's website meant that the demo page could be used to read all the data of customers who used the service.
"The data leakage described is not possible with our servers," replied James Johns, chief executive of software creator Retina-X Studios, at 1.47am BST this morning.
"Anyone trying this method would receive a message denying access. Retina-X Studios takes customer privacy very seriously. We have tested all services to verify that this is not an issue."
After checking the website, Sullivan confirmed that the problem had just been fixed. He has detailed the issue and provided screenshots on an F-Secure blog.
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