Michael Ott

<p>It’s often too easy to make edits to your web site that result in a broken link. This plugin will automatically email the web site administrator (or a specified email address) whenever a 404 is encountered, along with a link to the page the 404 originated from. With this knowledge in hand, you can search the page for the problem and either remove or fix it.</p>
<p>Notifications are also triggered by missing media, such as images, video, CSS files and more.</p>
<h3>Support</h3>
<p>Report any issues at the official <a href="https://wordpress.org/support/plugin/404-notify/" rel="ugc">404 Notify Support</a> WordPress page.</p>
<h3>How to use</h3>
<p>Once activated, notifications are automatially sent to the site administrator, or, you can specify an alternative email address in <strong>Settings</strong> -> <strong>General</strong> and look for the <strong>404 Notify email address</strong> field.</p>
<h3>Uninstall</h3>
<p>Deactivate the plugin, delete if desired.</p>


404 Notify

It works as presented. When an internal link leads to 404 you get an email alert. 

Job well done

Get a notification whenever a 404 is encountered on your web site.

Storm Rockwell

<p>This plugin automatically checks installed plugins for known vulnerabilities utilizing WPScan’s API and provides optional email alerts.</p>
<p><strong>Features:</strong></p>
<ul>
<li>Automatic vulnerability detection in plugins utilizing WPScan’s API</li>
<li>Optional email alerts</li>
<li>Utilizes WP Cron to check for new security updates twice a day</li>
<li>Cached API results to decrease backend load time significantly</li>
</ul>


Vulnerable Plugin Checker

Instantly works after activation, I didn't have to do anything else to set it up. Apparently my Visual Composer was vulnerable, wouldn't have found out otherwise.



Great stuff

I can say it has made me feel safer when hosting sites. I get alerted before a hack takes place as I have dealt with hacked sites for far too long. I haven't dealt with a hacked site running my plugin. Plugin vulnerabilities are the easiest way for a hacker to get into your site/server.

I love my plugin

Automatically checks installed plugins for known vulnerabilities and provides optional email alerts.

404 Notify vs Vulnerable Plugin Checker