xml/XMLHttpRequest.cpp in WebCore in WebKit before r38566 does not properly restrict access from web pages to the (1) Set-Cookie and (2) Set-Cookie2 HTTP response headers, which allows remote attackers to obtain sensitive information from cookies via XMLHttpRequest calls, related to the HTTPOnly protection mechanism.
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.