Personal information on thousands of Stratford residents is available to criminals on the internet.
Details ranging from home addresses to bank account numbers are being held on 5,335 people living in postcode area CV37.
In 813 cases 'high-risk' information is up for sale including credit card numbers, passwords and security answers for online accounts.
According to C6 Intelligence - the company which carried out the search for the Observer - the material is easy to access for those in the know.
Chief Executive Officer, Darren Innes, said: "As members of the public we only see between ten and 20 per cent of the internet. Lots of websites which are set up are purely being used by criminals.
"We call it the 'dark web' and it's the same place where drugs are sold and people go to get child pornography.
"The sale of personal data is almost risk-free crime because it's so hard to stop. When one site is shut down another opens up just a few hours later. People are getting away with it because the risk is so low."
The search by C6 Intelligence found 297 credit card numbers of Stratford residents, 58 of which came with the three-digit security code printed on the back of bank cards.
Nearly 500 email and password combinations were available to buy, as were seven account numbers and four answers to security questions.
When expanded to people living in postcode areas CV36 (Shipston) and B95 (Henley), the search found information on a total of 7,735 residents.
Mr Innes said criminals gathered personal data through a combination of sophisticated hacking and finding that readily available on social media websites like Facebook and LinkedIn.
This article has been extracted from http://www.stratfordobserver.co.uk/, please click on this link to read the article in full http://www.stratfordobserver.co.uk/2014/09/12/news-Bank-details-among-personal-data-on-'dark-web'-116460.html
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