Apple Safari 10.0.3(12602.4.8) WebKit - HTMLObjectElement::updateWidget Universal Cross-Site Scripting

Apple Safari 10.0.312602.4.8 WebKit - HTMLObjectElement::updateWidget Universal Cross-Site Scripting url; ... if !allowedToLoadFrameURLurl return; ... bool beforeLoadAllowedLoad = guardedDispatchBeforeLoadEventurl; ... bool success = beforeLoadAllowedLoad && hasValidClassId; if success success =...