[wp-trac] [WordPress Trac] #40085: Audio/video uploads are broken in 4.2.13 and 4.3.9

[WordPress Trac]

#40085: Audio/video uploads are broken in 4.2.13 and 4.3.9
--------------------------+------------------------
 Reporter:  uzegonemad    |       Owner:  joemcgill
     Type:  defect (bug)  |      Status:  assigned
 Priority:  normal        |   Milestone:  4.7.4
Component:  Media         |     Version:  3.7.19
 Severity:  blocker       |  Resolution:
 Keywords:  needs-patch   |     Focuses:
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Changes (by joemcgill):

 * owner:   => joemcgill
 * status:  new => assigned


Comment:

 Initially thought we could simply backport both `wp_kses_post_deep()` and
 `map_deep()` to these branches, but am thinking we should revert and use a
 more targeted approach than `wp_kses_post_deep()` (see: @ocean90 's
 [https://core.trac.wordpress.org/ticket/40075#comment:6 comment on
 40075]).

 Also need to investigate why we aren't seeing failing tests on these
 branches and make sure we have coverage for these code paths.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40085#comment:6>
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