Desk9 Design

LinkSentry is a lightweight WordPress plugin that allows your blog readers to easily report broken content. Whether it’s a broken download link, a dead external link, or a missing image, LinkSentry makes it simple for visitors to notify you.
Features:
<ul>
<li>Shortcode <code>[linksentry]</code> and Gutenberg block “Report Issue (LinkSentry)”</li>
<li>Accessible modal dialog with keyboard navigation and ARIA labels</li>
<li>Issue type selection (Download, Link, Image, Other)</li>
<li>Optional message and email fields</li>
<li>Stores reports as a custom post type with metadata</li>
<li>Per-IP throttling to prevent spam</li>
<li>Nonce verification and honeypot field for security</li>
<li>Optional email notifications to site administrators</li>
<li>Lightweight: assets only load where the shortcode/block is used</li>
<li>Fully internationalized (ready for translation)</li>
</ul>
Security:
<ul>
<li>Nonce verification on all submissions</li>
<li>Honeypot anti-spam field</li>
<li>Input sanitization and output escaping</li>
<li>Per-IP rate limiting via WordPress transients</li>
<li>IP addresses are hashed before storage</li>
</ul>
Admin Features:
<ul>
<li>View all reports in the WordPress admin</li>
<li>Custom columns: Issue Type, Page URL, Message, Submitted date</li>
<li>Settings page under Settings → LinkSentry</li>
<li>Configure notification email, enable/disable notifications, throttle window</li>
<li>Customizable button and form labels</li>
</ul>
<h3>Shortcode Usage</h3>
The <code>[linksentry]</code> shortcode can be used anywhere in your posts, pages, or widgets.
Basic usage: 
 <code>[linksentry]</code>
With button style options: 
 <code>[linksentry buttonStyle="button"] 
[linksentry buttonStyle="text-link"] 
[linksentry buttonStyle="large-box"]</code>
With custom info text (for large-box style): 
 <code>[linksentry buttonStyle="large-box" infoText="Found an issue? Let us know!"]</code>
Available button styles: 
* <code>button</code> – Default button style with icon (default) 
* <code>text-link</code> – Text link with icon, underline on hover 
* <code>large-box</code> – Full-width gray box with info text and button

LinkSentry – Broken Content Reporter

LinkSentry adds a "Report an issue" button (shortcode + block). Readers can report broken links, downloads, or images.

RaminMT

This plugin simply adds a button to Your site and let users report Your site broken links/problem and You can see them in WP dashboard. 
Description Box let You get site visitors name, email or anything You need plus description of what is the problem but if You don’t need this feature simply You can disable It from setting page 
With shortcode provided You can use plugin fully customized 🙂
<h3>Features</h3>
<ul>
<li>Fast & Light</li>
<li>Fully Customizable</li>
<li>Ajax Based</li>
<li>Secure</li>
<li>Dashboard Widget</li>
<li>Simple to use with shortcode, jQuery selector and default button</li>
<li>Description Box to get email/name of clients and their descriptions about problem</li>
</ul>

Links/Problem Reporter

It's a Sexy and Nice plugin to get reported your site's Problem/Broken Links

LinkSentry – Broken Content Reporter vs Links/Problem Reporter