CVE-2013-6672
Mozilla Firefox before 26.0 and SeaMonkey before 2.23 on Linux allow user-assisted remote attackers to read clipboard data by leveraging certain middle-click paste operations.
Date published : 2013-12-11
http://www.securityfocus.com/bid/64210
http://www.mozilla.org/security/announce/2013/mfsa2013-112.html