@bender-tags: 4.21.0, bug, 5431
@bender-ui: collapsed
@bender-ckeditor-plugins: wysiwygarea, toolbar, undo, clipboard

**Note** You may want to download a sample image. To do so, just right-click on the link and select `Save as`.

1. Paste [PNG image](%BASE_PATH%_assets/logo.png) into the editor.

**Expected** The image is not inserted into the editor and the notification: `The image/png file format(s) are not supported.` is displayed.

**Unexpected** The image is inserted into the editor.
