CVE-2013-6853
Cross-site scripting (XSS) vulnerability in clickstream.js in Y! Toolbar plugin for FireFox 3.1.0.20130813024103 for Mac, and 2.5.9.2013418100420 for Windows, allows remote attackers to inject arbitrary web script or HTML via a crafted URL that is stored by the victim.
Date published : 2014-01-25
http://www.securityfocus.com/bid/64971
http://packetstormsecurity.com/files/124800/Y-Toolbar-Cross-Site-Scripting.html