Apple WebKit / Safari 10.0.3 (12602.4.8) - Synchronous Page Load Universal Cross-Site Scripting

URL scriptURL; URL url; if protocolIsJavaScripturlString scriptURL = completeURLurlString; // completeURL encodes the URL. url = blankURL; else url = completeURLurlString; if shouldConvertInvalidURLsToBlank && !url.isValid url = blankURL; Frame frame = loadOrRedirectSubframeownerElement, url,...

WebKit: UXSS via a synchronous page load（CVE-2017-2480）

Here's a snippet of the method SubframeLoader::requestFrame which is invoked when the |src| of an iframe object is changed. bool SubframeLoader::requestFrameHTMLFrameOwnerElement& ownerElement, const String& urlString, const AtomicString& frameName, LockHistory lockHistory, LockBackForwardList...