From Microsoft: The Microsoft Data Access Component Internet Publishing Provider provides access to WebDAV resources over the Internet. By design, it should differentiate between requests made by a user and those made by script running in the userÃ???Ã??Ã?Â¢??s browser. However, because of an implementation flaw, it handles all requests in the security context of the user. As a result, if a user browsed to a web page or opened an HTML e-mail that contained script, that script could access web-based resources as the user.
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