Java Runtime Environment (JRE) and SDK 1.2 through 1.3.0_04 allows untrusted applets to access the system clipboard.
https://exchange.xforce.ibmcloud.com/vulnerabilities/7333
http://www.securityfocus.com/advisories/3617
http://sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/208&type=0&nav=sec.sba
http://cert.uni-stuttgart.de/archive/bugtraq/2001/10/msg00120.html