Red Hat Security Advisory 2015-1982-01 – Mozilla Firefox is an open source web browser. XULRunner provides the XUL Runtime environment for Mozilla Firefox. Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code with the privileges of the user running Firefox. A same-origin policy bypass flaw was found in the way Firefox handled certain cross-origin resource sharing requests. A web page containing malicious content could cause Firefox to disclose sensitive information.