BT has taken another broadside from security professionals only days after a glitch on its website compromised customer details.
According to UK-based security firm MIS, BT's website is still insecure and the telecoms giant has been accused of being "naive" in its attitude to security.
Paul Rogers, network security analyst at MIS, said that although BT has fixed the problem, which left customer details vulnerable on Friday, it is still possible to view other customers details if you have certain information.
"One of the URLs on the site contains two fields," said Rogers, "Telnum= and Custref=. These represent telephone number and customer reference number, respectively. By substituting different numbers in these fields, you can access other customers' details."
Although Rogers acknowledged that the vulnerability was more theoretical than practical, as both numbers would need to be attributed to the same customer, he criticised BT for not using a stronger form of customer authentication.
"BT may think it's not an issue because you need the customer reference number, but it's a very naive point of view, like BT doesn't care about security," said Rogers.
"It leads Joe Public to wonder whether BT is taking security seriously enough. There could be vulnerabilities on other parts of the site because of that attitude," he added.
BT spokesman Mike Bartlett, hit back at Rogers, saying that only top level billing details, such as the bill for the current quarter, would be available through this exploit.
"To access any more details you need a secure PIN number, which you only receive after registering with us," he said.
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