[wp-trac] [WordPress Trac] #40175: Upload Validation / MIME Handling

[WordPress Trac]

#40175: Upload Validation / MIME Handling
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 Reporter:  blobfolio     |       Owner:  joemcgill
     Type:  defect (bug)  |      Status:  accepted
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Media         |     Version:  4.7.3
 Severity:  critical      |  Resolution:
 Keywords:                |     Focuses:
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Comment (by blobfolio):

 Replying to [comment:7 lovelucy]:
 > @blobfolio  Related to #39550, I found another xls that cannot be
 uploaded to WordPress, which is tested with result MIME:
 `application/CDFV2-unknown`

 Awesome, thanks @lovelucy! It seems CDFV2 is another hardcoded non-MIME
 MIME living inside the `fileinfo.so` extension, only unlike `application
 /ms-office`, it gets variable bits tacked onto the end like "unknown" and
 "corrupt". I'll add a workaround of some sort to the #39963 patch.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40175#comment:8>
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