Peter Westwood

This plugin allows you to configure extra mime-types for support by the inline-uploader.
A new options page is added as Options … Mime-types which allows you to add/delete the extra mime-types.
By default the following extra mime-types are registered: audio/ac3, audio/MPA and video/x-flv.
With version 0.90 of the plugin you are now able to upload a file containing a long list of mime types as an easy way to register multiple mime-types. 
The file format is “mime/type extension” for example like this:
<pre><code>audio/ac3 ac3
audio/MPA mpa
video/x-flv flv
</code></pre>

PJW Mime Config

This plugin allows you to configure extra mime-types for support by the inline-uploader.

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.

PJW Mime Config vs Lord of the Files: Enhanced Upload Security