The host is installed with Google Chrome before 30.0.1599.101 or Apple Safari before 6.1.4 or 7.x before 7.0.4 and is prone to use-after-free vulnerability. The flaws are present in the HTMLFormElement::prepareForSubmission function in core/html/HTMLFormElement.cpp in Blink, which fails to handle vectors related to submission for FORM elements. Successful exploitation allows remote attackers to cause a denial of service or possibly have unspecified other impact.