it is important to uncover software version number.
Source Code
Easiest way to do so is by reading the page source code (We can search for the meta generator tag).
...SNIP...
<link rel='https://api.w.org/' href='http://blog.inlanefreight.com/index.php/wp-json/' />
<link rel="EditURI" type="application/rsd+xml" title="RSD" href="http://blog.inlanefreight.com/xmlrpc.php?rsd" />
<link rel="wlwmanifest" type="application/wlwmanifest+xml" href="http://blog.inlanefreight.com/wp-includes/wlwmanifest.xml" />
<meta name="generator" content="WordPress 5.3.3" />
...SNIP...CSS
...SNIP...
<link rel='stylesheet' id='bootstrap-css' href='http://blog.inlanefreight.com/wp-content/themes/ben_theme/css/bootstrap.css?ver=5.3.3' type='text/css' media='all' />
<link rel='stylesheet' id='transportex-style-css' href='http://blog.inlanefreight.com/wp-content/themes/ben_theme/style.css?ver=5.3.3' type='text/css' media='all' />
<link rel='stylesheet' id='transportex_color-css' href='http://blog.inlanefreight.com/wp-content/themes/ben_theme/css/colors/default.css?ver=5.3.3' type='text/css' media='all' />
<link rel='stylesheet' id='smartmenus-css' href='http://blog.inlanefreight.com/wp-content/themes/ben_theme/css/jquery.smartmenus.bootstrap.css?ver=5.3.3' type='text/css' media='all' />
...SNIP...JS
...SNIP...
<script type='text/javascript' src='http://blog.inlanefreight.com/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp'></script>
<script type='text/javascript' src='http://blog.inlanefreight.com/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1'></script>
<script type='text/javascript' src='http://blog.inlanefreight.com/wp-content/plugins/mail-masta/lib/subscriber.js?ver=5.3.3'></script>
<script type='text/javascript' src='http://blog.inlanefreight.com/wp-content/plugins/mail-masta/lib/jquery.validationEngine-en.js?ver=5.3.3'></script>
<script type='text/javascript' src='http://blog.inlanefreight.com/wp-content/plugins/mail-masta/lib/jquery.validationEngine.js?ver=5.3.3'></script>
...SNIP...In older WordPress versions, another source for uncovering version information is the readme.html file in WordPress’s root directory.