Unsupported DHTML Editing Control (1102 / 1202 / 1302 / 1402)

AdminStudio 2021 | 21.0 | Application Manager

For this browser compatibility test, the web application contents are scanned for the usage of the ActiveX DHTML Editing Control.

Test Group/Test Category

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1302—Browser Compatibility/Internet Explorer 11

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1402—Browser Compatibility/Microsoft Edge

Severity

Warning

Message

This web application contains unsupported DHTML Editing Control (File: [FILE_NAME]).

Background

Windows Vista (which included Internet Explorer 7) and later systems do not have support for the DHTML Editing Control. Support was removed because of security reasons. Web applications that use the safe-for-scripting DHTML Editing Control might fail to load the control. In that case, an image placeholder is displayed instead of the DHTML Editing Control. In addition, any script that references the control might generate exceptions. Because script exceptions terminate the script evaluation, it is likely that unrelated functionality that is controlled by the script might also be rendered inoperative.

Resolution

The web application should be re-engineered to avoid using the DHTML Editing Control. Where this is not feasible, Microsoft provides a downloadable original control in a signed Windows Installer package called DHTMLEd.msi.

Caution:Since this workaround leaves applications unchanged, they remain exposed to the same security risks that Microsoft originally identified.

See Also

Replacing the DHTML Editing Control in Windows Vista and Beyond