What is the unfiltered_html permission in WordPress?
“unfiltered_html” is a security feature in WordPress that prevents users from using tags such as
unfiltered_html could be very dangerous in the wrong hands, so please don’t give this permission to any users you don’t trust. WordPress has disabled this permission for most users because they rarely need it. For example, if you need to use embeds that WordPress doesn’t support look around for plugins such as EmbedPress.
How does the unfiltered_html permission work?
Let’s see unfiltered_html in action. In the post below, I’ve created a Paragraph block:
In the block settings, I click the “Edit as HTML” option:
Now in the HTML version of the block, I enter the HTML code for an iframe:
When I try to save this post, or edit the block visually, WordPress will complain with the message: “This block contains unexpected or invalid content.”
If you click “Resolve”, WordPress will try to convert the code to something safer. However, the code shown below in the “After Conversion” area will not work:
How to give users the unfiltered_html permission
If you use the Capability Manager Enhanced plugin, you can enable or disable this permission for each user role.
- Go to Permissions > Role Capabilties in your WordPress admin area.
- In the top-right corner of the screen, load the user role that you want to customize. In this image below, I’ve chosen the “Editor” role:
In the center of the screen, you can now set the permissions. If you want to allow people in the Editor role to create posts, check the “unfiltered html” box. Click the blue “Save Changes” button to finish,
If you want to set these permissions across a multisite network, follow these instructions. On WordPress multisite networks, only Super Admins have the unfiltered_html permission.
Finally, it’s worth noting that I gave the example for unfiltered_html in a Post, but the permissions also works inside other post types, plus comments and widgets.