Version of installed wordpress can be found by number of ways. We explain here one by one
WordPress files
Version.php
If you have cpanel of FTP access then locate the file wp-includes/version.php and you will find following:
/**
* The WordPress version string
*
* @global string $wp_version
*/
$wp_version = ‘4.7.3’; // current version of installed wordpress.
about.php
Login using username and password of administrator and type following in browser address bar:
https://<you-domain.com>/wp-admin/about.php
and it will display detail of currently installed wordpress including version.
Readme.html File
Generally readme.html file is publically accessible on websites and can be accessed by typing http://datumsol.com /readme.html.
By inspecting meta tag:
If admin of site has not edited a meta tag with version of wordpresss exists in source of page. You can view the meta tag by right clicking on page and view page source and search following meta tag:
<meta name=”generator” content=”WordPress 4.7.3″ />
Feed Link
Type http://<youdomain.com>/feed/ and you will get an xml document which will include following tag:
<generator>https://wordpress.org/?v=4.7.3</generator>