Sergey Biryukov

With the upgrade to WordPress 4.7.1, some non-image files fail to upload on certain server setups. This will be fixed in 4.7.3, see the <a href="https://core.trac.wordpress.org/ticket/39550" rel="nofollow ugc">Trac ticket</a>.
In the meantime, this plugin is a workaround that disables the recently introduced strict MIME check to restore the upload functionality.
Don’t forget to remove the plugin once WordPress 4.7.3 is available!

Disable Real MIME Check


IDK if it's a bug in WC or something, but I can't upload .csv files, had to hook this in so I can update some prices... very helpful!


works in WP 6.1 and WC 7.5

Restores the ability to upload non-image files in WordPress 4.7.1 and 4.7.2.

Blobfolio

WordPress relies mostly on name-based validation when deciding whether or not to allow a particular file, leaving the door open for various kinds of attacks.
Lord of the Files adds to this content-based validation and sanitizing, making sure that files are what they say they are and safe for inclusion on your site.
The main features include:
<ul>
<li>Robust real filetype detection;</li>
<li>Full MIME alias mapping;</li>
<li>SVG sanitization (if SVG uploads have been independently allowed);</li>
<li>File upload validation debugger;</li>
<li>Fixes issues related to <a href="https://core.trac.wordpress.org/ticket/40175" rel="nofollow ugc">#40175</a> that have been present since WordPress <code>4.7.1</code>.</li>
<li>Fixes ambiguous media extensions <a href="https://core.trac.wordpress.org/ticket/40921" rel="nofollow ugc">#40921</a></li>
</ul>
<h3>Requirements</h3>
<ul>
<li>WordPress 5.2 or later.</li>
<li>PHP 7.4 or later.</li>
<li><code>dom</code> PHP extension.</li>
<li><code>fileinfo</code> PHP extension.</li>
<li><code>mbstring</code> PHP extension.</li>
<li><code>xml</code> PHP extension.</li>
</ul>
Please note: it is not safe to run WordPress atop a version of PHP that has reached its <a href="http://php.net/supported-versions.php" rel="nofollow ugc">End of Life</a>. Future releases of this plugin might, out of necessity, drop support for old, unmaintained versions of PHP. To ensure you continue to receive plugin updates, bug fixes, and new features, just make sure PHP is kept up-to-date. 🙂
<h3>Privacy Policy</h3>
This plugin does not make use of or collect any “Personal Data”.

Lord of the Files: Enhanced Upload Security

This plugin expands file-related security and sanity around the upload process.

Disable Real MIME Check vs Lord of the Files: Enhanced Upload Security