Hastymail 1.0.1 and earlier (stable) and 1.1 and earlier (development) does not send the "attachment" parameter in the Content-Disposition field for attachments, which causes the attachment to be rendered inline by Internet Explorer when the victim clicks the download link, which facilitates cross-site scripting (XSS) and possibly other attacks.

Unknown versions of Internet Explorer and Outlook allow remote attackers to spoof a legitimate URL in the status bar via A HREF tags with modified "alt" values that point to the legitimate site, combined with an image map whose href points to the malicious site, which facilitates a "phishing" attack.

The WebBrowser ActiveX control, or the Internet Explorer HTML rendering engine (MSHTML), as used in Internet Explorer 6, allows remote attackers to execute arbitrary code in the Local Security context by using the showModalDialog method and modifying the location to execute code such as Javascript, as demonstrated using (1) delayed HTTP redirect operations, and an HTTP response with a Location: header containing a "URL:" prepended to a "ms-its" protocol URI, or (2) modifying the location attribute of the window, as exploited by the Download.ject (aka Scob aka Toofer) using the ADODB.Stream object.

Integer overflow in imgbmp.cxx for Windows 2000 allows remote attackers to execute arbitrary code via a BMP image with a large bfOffBits value.

Internet Explorer 5.01 through 6 SP1 allows remote attackers to bypass zone restrictions via a javascript protocol URL in a sub-frame, which is added to the history list and executed in the top window's zone when the history.back (back) function is called, as demonstrated by BackToFramedJpu, aka the "Travel Log Cross Domain Vulnerability."

Internet Explorer 5.01 through 6 SP1 allows remote attackers to direct drag and drop behaviors and other mouse click actions to other windows by using method caching (SaveRef) to access the window.moveBy method, which is otherwise inaccessible, as demonstrated by HijackClickV2, a different vulnerability than CVE-2003-0823, aka the "Function Pointer Drag and Drop Vulnerability."

The download function of Internet Explorer 6 SP1 allows remote attackers to obtain the cache directory name via an HTTP response with an invalid ContentType and a .htm file, which could allow remote attackers to bypass security mechanisms that rely on random names, as demonstrated by threadid10008.

Certain versions of Internet Explorer 5 and 6, in certain Windows environments, allow remote attackers to cause a denial of service (freeze) via a URL to C:\aux (MS-DOS device name) and possibly other devices.

Microsoft Internet Explorer 5.0, 5.01, and 5.5 allows remote attackers to monitor the contents of the clipboard via the getData method of the clipboardData object.

Microsoft Internet Explorer 5.0 through 6.0 allows remote attackers to cause a denial of service (crash) via an object of type "text/html" with the DATA field that identifies the HTML document that contains the object, which may cause infinite recursion.

Internet Explorer 5.0, 5.0.1 and 5.5 with JavaScript execution enabled allows remote attackers to determine the existence of arbitrary files via a script tag with a src parameter that references a non-JavaScript file, then using the onError event handler to monitor the results.

Microsoft Internet Explorer 6.0 and possibly others allows remote attackers to upload arbitrary file contents when users press a key corresponding to the JavaScript (1) event.ctrlKey or (2) event.shiftKey onkeydown event contained in a webpage. NOTE: it was reported that the vendor has disputed the severity of this issue.

Cross-site scripting vulnerability (XSS) in Internet Explorer 5.01 through 6.0 allows remote attackers to read and execute files on the local system via web pages using the <frame> or <iframe> element and javascript, aka "Frames Cross Site Scripting," as demonstrated using the PrivacyPolicy.dlg resource.

The (1) CertGetCertificateChain, (2) CertVerifyCertificateChainPolicy, and (3) WinVerifyTrust APIs within the CryptoAPI for Microsoft products including Microsoft Windows 98 through XP, Office for Mac, Internet Explorer for Mac, and Outlook Express for Mac, do not properly verify the Basic Constraints of intermediate CA-signed X.509 certificates, which allows remote attackers to spoof the certificates of trusted sites via a man-in-the-middle attack for SSL sessions, as originally reported for Internet Explorer and IIS.

Internet Explorer 4.0 and later allows remote attackers to read arbitrary files via a web page that accesses a legacy XML Datasource applet (com.ms.xml.dso.XMLDSO.class) and modifies the base URL to point to the local system, which is trusted by the applet.

Internet Explorer 5.0 through 6.0 allows remote attackers to determine the existence of files on the client via an IMG tag with a dynsrc property that references the target file, which sets certain elements of the image object such as file size.

Internet Explorer 5, 5.6, and 6 allows remote attackers to bypass cookie privacy settings and store information across browser sessions via the userData (storeuserData) feature.

Cross-site scripting vulnerability in Internet Explorer 6.0 allows remote attackers to execute scripts in the Local Computer zone via a URL that exploits a local HTML resource file, aka the "Cross-Site Scripting in Local HTML Resource" vulnerability.

Cross-site scripting vulnerability in Internet Explorer 6 earlier allows remote attackers to execute arbitrary script via an Extended HTML Form, whose output from the remote server is not properly cleansed.

Internet Explorer 5.x and 6 interprets an object as an HTML document even when its MIME Content-Type is text/plain, which could allow remote attackers to execute arbitrary script in documents that the user does not expect, possibly through web applications that use a text/plain type to prevent cross-site scripting attacks.