[wp-trac] [WordPress Trac] #53801: Block-based Widgets Screen does action wp_footer after each Widget

[WordPress Trac]

#53801: Block-based Widgets Screen does action wp_footer after each Widget
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 Reporter:  MadtownLems   |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Widgets       |    Version:
 Severity:  normal        |   Keywords:
  Focuses:                |
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 I've reported this on Github already
 (https://github.com/WordPress/gutenberg/issues/33580), but I'm really not
 sure the right place to post issues these days so figured I'd post here as
 well to make sure it gets looked at before 5.8.1

 WordPress 5.8's Block-based Widgets screen does action wp_footer in
 between each widget. This action has historically been reserved for only
 the front-end of the site (as admin_footer is the back-end version). It's
 where many plugins output things in the footer.

 This can result in a very broken and ugly widgets screen, with all sorts
 of unintended content showing up. (In our specific case, we noticed
 because a bunch of standardized legal text and brand images were showing,
 but I've read other reports of GPDR notices or "chat with us"
 implementations as well.)

 Sample code for proof of concept:
 {{{#!php
 <?php
 add_action( 'wp_footer', 'wp_footer_proof_of_concept' );

 function wp_footer_proof_of_concept() {
 echo "Why is this being output on the Widgets screen?";
 }
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/53801>
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