The server filters out dangerous things in style attributes, but it doesn't filter id or class. They can be used to set style attributes that are otherwise blocked, such as position or creating a lightbox.
Pasting text copied from another case can bring the code of buttons of the old text page.
- For new support cases, the following recommendation can be given to the customer as a stop-gap workaround for pasting into the editor without additional markup.
- Paste and Match Style on a Mac: Hold down Shift + Option + Command and hit V.
- Paste Plain Text in Chrome on Windows:Hold down Shift + Control and hit V.