Two vulnerabilities have been discovered in Firefox, which can be exploited by malicious people to conduct cross-site scripting attacks and compromise a user’s system.1) The problem is that “IFRAME” JavaScript URLs are not properly protected from being executed in context of another URL in the history list. This can be exploited to execute arbitrary HTML and script code in a user’s browser session in context of an arbitrary site.
2) Input passed to the “IconURL” parameter in “InstallTrigger.install()” is not properly verified before being used. This can be exploited to execute arbitrary JavaScript code with escalated privileges via a specially crafted JavaScript URL.
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The vulnerabilities has been confirmed on current Firefox version 1.0.3. The solution is, negatively, disable JavaScript in the browser.
it is not wise to disable javascript.
that’s why I added “negatively”. Disable Javascript completely will give you trouble on browsing websites.