[wp-trac] [WordPress Trac] #48955: WP 5.3.1 changes cause potential backwards compatibility breakage with kses

[WordPress Trac]

#48955: WP 5.3.1 changes cause potential backwards compatibility breakage with kses
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 Reporter:  iCaleb        |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  5.3.3
Component:  Security      |     Version:  5.3.1
 Severity:  normal        |  Resolution:
 Keywords:  needs-patch   |     Focuses:
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Comment (by aduth):

 Replying to [comment:22 xkon]:
 > It seems that due to the mentioned hook `add_filter( 'pre_kses',
 'wp_pre_kses_block_attributes', 10, 3 );` the `parse_blocks()` is running
 everywhere throughout the admin. Is this expected behavior?

 Yes. These screens use one or more of the `wp_kses` family of functions.
 The default KSES behavior will now filter a markup string for block
 content.

 See also: comment:18

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Ticket URL: <https://core.trac.wordpress.org/ticket/48955#comment:23>
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