Opera before 11.65 does not properly restrict the opening of a pop-up window in response to the first click of a double-click action, which…

Opera before 11.65 does not properly restrict the opening of a pop-up window in response to the first click of a double-click action, which makes it easier for user-assisted remote attackers to conduct cross-site scripting (XSS) attacks or execute arbitrary code via a crafted web site.