I can't upload an Excel file onto my WordPress website any longer. I keep getting a message tha

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  supernovia · Staff · Feb 22, 2017 at 5:26 pm

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  @robertbruce737, hmm, I tested your file in Chrome here, too, and did not have a problem. Please try another browser to see if you get a different result there (in case it’s plugin conflict in your Chrome installation.)

  You can also try clearing cache in Chrome to see if that will help:
  http://en.support.wordpress.com/browser-issues/

  Please let us know the results of both.

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  supernovia · Staff · Feb 22, 2017 at 9:04 pm

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  @robertbruce737 is your site hosted on our servers or are you running your own installation?

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  supernovia · Staff · Feb 22, 2017 at 9:06 pm

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  @robertbruce737 please go to https://wordpress.com/post and confirm that is the URL you are using. I don’t see any sites on your account, even self-hosted sites that are connected via Jetpack.

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  mmihelic · Member · Mar 29, 2017 at 9:06 am

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  We have just run into this issue.
  As far as we could diagnose the problem, password protected xlsx file fail to upload. The same file without password protection uploads OK.
  The same goes for our self hosted WordPress sites.

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  supernovia · Staff · Mar 29, 2017 at 8:46 pm

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  @mmihelic are you using wordpress.com/post or wp-admin?

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  mmihelic · Member · Mar 30, 2017 at 10:21 am

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  @supernovia I used wp-admin, tried to upload the file to my Media Library using drag&drop.
  After your prompt I also tried to upload the same file from within a post (post-new.php).
  Same result both times.

  Workbook1-XLSX-pass.xlsx
  Sorry, this file type is not permitted for security reasons.

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  supernovia · Staff · Mar 30, 2017 at 6:37 pm

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  Thank you. I noticed you posted at the WordPress.org forums about this as well and they suggested it’s an apache thing. I don’t think that’s the issue considering all this:
  https://core.trac.wordpress.org/changeset/40124

  Can you confirm this by uploading a very simple spreadsheet (just a few rows of data, no macros, etc.) and password protecting it to see if that does the same thing?

  Also did you happen to notice when this started, or rather, when it last worked?

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  mmihelic · Member · Mar 31, 2017 at 7:39 am

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  I was made aware of the issue by one of our users. Then I started looking into it. I found this post and since I also have a site on WordPress.com I tried to upload the same files.
  I used spreadsheet with a few populated cells, no fancy stuff. I saved it once as it was, then as another file with added password protection.
  I can confirm that my WordPress.com site and the site at work produced the same result when uploading the files.

  Unfortunately I can only give you vague estimate for our work site. The issue started when we upgraded from 4.2.1 straight to 4.7.2 at the time, currently at 4.7.3. Your changelog link explains the reason why the issue exists.

  I dismissed the Apache suggestion rather quickly, because it did not make sense to me.
  I delved into the network site at work and came to
  $real_mime = finfo_file( $finfo, $file );
  This is line 2319 in
  /opt/wordpress/wp-includes/functions.php

  I wrote a post about my experience yesterday.
  https://mmihelic.wordpress.com/2017/03/30/uploading-password-protected-excel-files-to-wordpress/

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  supernovia · Staff · Apr 1, 2017 at 4:59 pm

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  Thanks, hmm. So that particular changeset was to fix some broken uploads, and I’d figured we’d missed one. Bu I could see adding CDFV2-corrupt causing some issues potentially. I’ll pass this along though.