Impact
Users with low privileges (like contributors and authors) can use the embed block in a certain way to inject unfiltered HTML in the block editor. When affected posts are viewed by a higher privileged user, this could lead to script execution in the editor/wp-admin.
Patches
This has been patched in WordPress 5.4.2, along with all the previously affected versions via a minor release. Automatic updates are enabled by default for minor releases and we strongly recommend that you keep them enabled.
For more information
If you have any questions or comments about this advisory:
Impact
Users with low privileges (like contributors and authors) can use the embed block in a certain way to inject unfiltered HTML in the block editor. When affected posts are viewed by a higher privileged user, this could lead to script execution in the editor/wp-admin.
Patches
This has been patched in WordPress 5.4.2, along with all the previously affected versions via a minor release. Automatic updates are enabled by default for minor releases and we strongly recommend that you keep them enabled.
For more information
If you have any questions or comments about this advisory: