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Lepton CMS 1.2.0 Cross Site Scripting

Lepton CMS 1.2.0 Cross Site Scripting
Posted Jul 16, 2012
Authored by Benjamin Kunz Mejri, Vulnerability Laboratory | Site vulnerability-lab.com

Lepton CMS version 1.2.0 suffers from multiple cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
SHA-256 | a1950761b16455f0831bfaca8919628053e40986ef93c4860bbb883b3dd0f353

Lepton CMS 1.2.0 Cross Site Scripting

Change Mirror Download
Lepton v1.2.0 CMS - Multiple Web Vulnerabilities




Common Vulnerability Scoring System:

LEPTON is an easy-to-use but full customizable Content Management System (CMS). LEPTON enables you to run nearly all
the websites most others current CMS promise you but has the big advantage of extremely short learning and training
curves, and this is a great argument to those who work with LEPTON. LEPTON needs a MySQL database, the most common
database on webspaces. LEPTON is easily installed and started, and - what is really important - can easily be adapted
to fit the needs of nearly all web appearences. Besides many other features LEPTON got ...

easy to use backend
content input via wysiwyg-editors
file and media management
design via template system
addons to extend cms
scaling access system
and much more...

(Copy of the Vendor Homepage: http://www.lepton-cms.org/english.php?lang=EN )

The Vulnerability Laboratory Research Team discovered multiple Web Vulnerabilities in the Lepton v1.2.0 Content Management System.

2012-06-23: Public or Non-Public Disclosure




Multiple persistent input validation vulnerabilities are detected in iScripts Reserve Logic v1.2 Booking Content Management System.
The bugs allow remote attackers to implement/inject malicious script code on the application side (persistent). The persistent
vulnerabilities are located in the modify groups, add user, listing, Profile & add page module(s) with the bound vulnerable parameters
Groupname, Username, Display Name & list_page_title. Exploitation requires low user inter action & privileged application user account.
Successful exploitation of the vulnerability can lead to session hijacking (admin) or stable (persistent) context manipulation.

Vulnerable Module(s):
[+] Modify Groups - Group
[+] Access - Add User
[+] Preferences - My Settings - Profile
[+] Add Page

Vulnerable Parameter(s):
[+] Group Name
[+] Username
[+] Display Name
[+] list_page_title & url (modify_link)

Proof of Concept:
The persistent web vulnerabilities can be exploited by remote attacker with privileged user account or without user account.
To exploit the vulnerability low or medium user inter action is required. For demonstration or reproduce ...

Review: Access - Add User > Username

<form name="user" action="http://demo.xxx.com/lepton/admins/users/add.php?leptoken=462c08f506b7992a08a40z1340321337" method="post" class="">
<input name="user_id" value="" type="hidden">
<input name="username_fieldname" value="username_Age0ll2" type="hidden">
<p>Minimum length for user name: 3 chars, Minimum length for Password: 6 chars!</p>
<table 0"="" border="0" cellpadding="0 cellspacing=" width="100%">
<td width="150">Username:</td>
<td class="value_input">
<input name="username_Age0ll2" value="\" type="text"><[PERSISTENT INJECTED SCRIPT CODE])' <"="">
<td class="value_input">
<input type="password" name="password" value=""><[PERSISTENT INJECTED SCRIPT CODE]) <" />
<td>Re-type Password:</td>
<td class="value_input">
<input type="password" name="password2" value=""><[PERSISTENT INJECTED SCRIPT CODE]<" />


Review: Preferences - My Settings - Profile > Displayname

<optgroup label="Pages"><option value="pages/modify.php?page_id=2" selected="selected">
<option value="pages/modify.php?page_id=1">hello world</option>


Review: Modify Groups - Group

<table border="0" cellpadding="2" cellspacing="0" width="100%">
<td width="150">Name:</td>
<input name="group_name" maxlength="255" type="text"><[PERSISTENT INJECTED SCRIPT CODE]' <"="" style="width: 98%;">


Review: Add Page - Listing (url or link)

<img src="index.php2-Dateien/visible_16.png" alt="Visibility: Public" class="page_list_rights">
<span class="modify_link">"><[PERSISTENT INJECTED SCRIPT CODE]") <</span></a>
<td class="list_page_title">"><[PERSISTENT INJECTED SCRIPT CODE]") <</td>
<td class="list_page_URL">/hello-world/[PERSISTENT INJECTED SCRIPT CODE]28vl29.php</td>
<td class="list_page_id">2</td>


The security risk of the persistent input validation vulnerabilities are estimated as medium.

Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@vulnerability-lab.com)
Vulnerability Laboratory [Research Team] - Ibrahim El-Sayed [storm] (strom@vulnerability-lab.com)

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