Cross-zone scripting vulnerability in the Wizz RSS Reader before 2.1.9 extension to Mozilla Firefox allows remote attackers to execute arbitrary Javascript in the browser chrome via the RSS feed DOM.
https://exchange.xforce.ibmcloud.com/vulnerabilities/33693
https://addons.mozilla.org/en-US/firefox/addon/424
http://www.vupen.com/english/advisories/2007/1425
http://www.securityfocus.com/bid/23523
http://www.kb.cert.org/vuls/id/MIMG-6ZKP4T
http://www.kb.cert.org/vuls/id/319464
http://wizzrss.blat.co.za/2009/11/17/so-much-for-nsiscriptableunescapehtmlparsefragment/