In Wufoo, in the "Forms" view, navigate to your form, hover over Share select Embed form.

Scroll down the page the the Embed your form section. With the first tab (Embed with JavaScript) selected, highlight all of the Embed code and copy it. Alternatively, you can click the green Copy Code button.

In the CMS, select the page on which you’d like the form to appear. Click Edit.
Expand the Editor Content Type. Select Tools > Source code.

Paste the code into the editor, and click Ok.
You will see a yellow placeholder box appear in the WYSIWYG editor.
Click the three dots ("kabob" menu) next to Preview Draft at the top right. Then, click Check Content & Submit to save your page. The spelling/link checker window will appear. Once you have reviewed and corrected any issues, click the blue check mark to finish submitting your page. Your page is not saved until you click this checkmark, even if you have no spelling or link errors.
Your form will appear on the page.
Note: If you make future edits to the form in Wufoo, they will automatically appear on the CMS page. You do not need to re-embed the code or re-publish your page.