PayPal XSS vulnerability affects EV SSL

Users who think they are on a trusted page could access a fraudulent page and possibly have their personal information exposed.

A new attack on PayPal could have allowed users who thought they were on a trusted page to access a fraudulent page and possibly expose personal information. On Friday, Finnish researcher Harry Sintonen reported the vulnerability on an IRC chat room.

In an interview with Netcraft, Sintonen said the issue was critical. "You could easily steal credentials." He added that in this case you can't trust the URL

A few weeks ago PayPal announced it would block users whose browsers did not support EV SSL. Sintonen, who is credited with finding an XSS attack on Barack Obama's Web site in April, said his vulnerability also affected EV SSL pages.

In response, a PayPal representative said: "At PayPal, we take safety and security very seriously. As soon as we were informed of this exploit, we began working very quickly to shut it down. To our knowledge, this exploit was not used in any phishing attacks.

"However, as in any phishing incident, we encourage our customers to contact us immediately if they believe they have given out any personal or financial information that would jeopardize the security of their accounts or lead to unauthorized account access. If an unauthorized withdrawal or purchase is made on a PayPal account, PayPal will reimburse that customer 100 percent. We encourage all of our customers to frequently check the status of their accounts to ensure security."

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