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InstantASP InstantForum.NET 3.x / 4.x Cross Site Scripting

InstantASP InstantForum.NET 3.x / 4.x Cross Site Scripting
Posted Feb 18, 2015
Authored by Jing Wang

InstantASP InstantForum.NET versions 3.4.0, 4.0.0, 4.1.0, 4.1.1, 4.1.2, and 4.1.3 suffer from multiple cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
advisories | CVE-2014-9468
MD5 | 8d3e3a7ad0e131962e1a233836a77496

InstantASP InstantForum.NET 3.x / 4.x Cross Site Scripting

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*CVE-2014-9468 InstantASP InstantForum.NET Multiple XSS (Cross-Site
Scripting) Security Vulnerabilities*

Exploit Title: InstantASP InstantForum.NET Multiple XSS (Cross-Site
Scripting) Security Vulnerabilities
Product: InstantForum.NET
Vendor: InstantASP
Vulnerable Versions: v4.1.3 v4.1.1 v4.1.2 v4.0.0 v4.1.0 v3.4.0
Tested Version: v4.1.3 v4.1.1 v4.1.2
Advisory Publication: Feb 18, 2015
Latest Update: Feb 18, 2015
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2014-9468
CVSS Severity (version 2.0):
CVSS v2 Base Score: 4.3 (MEDIUM) (AV:N/AC:M/Au:N/C:N/I:P/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6
Credit: Wang Jing [Mathematics, Nanyang Technological University, Singapore]

*Advisory Details:*

*(1) Vendor & Product Description:*


*Product & Version:*
v4.1.3 v4.1.1 v4.1.2 v4.0.0 v4.1.0 v3.4.0

*Vendor URL & Download:*
InstantForum.NET can be downloaded from here,

*Product Introduction:*
“InstantForum.NET is a feature rich, ultra high performance ASP.NET & SQL
Server discussion forum solution designed to meet the needs of the most
demanding online communities or internal collaboration environments. Now in
the forth generation, InstantForum.NET has been completely rewritten from
the ground-up over several months to introduce some truly unique features &
performance enhancements."

"The new administrator control panel now offers the most comprehensive
control panel available for any ASP.NET based forum today. Advanced
security features such as role based permissions and our unique Permission
Sets feature provides unparalleled configurable control over the content
and features that are available to your users within the forum. Moderators
can easily be assigned to specific forums with dedicated moderator
privileges for each forum. Bulk moderation options ensure even the busiest
forums can be managed effectively by your moderators."

"The forums template driven skinning architecture offers complete
customization support. Each skin can be customized to support a completely
unique layout or visual appearance. A single central style sheet controls
every aspect of a skins appearance. The use of unique HTML wrappers and
ASP.NET 1.1 master pages ensures page designers can easily integrate an
existing design around the forum. Skins, wrappers & master page templates
can be applied globally to all forums or to any specific forum."

*(2) Vulnerability Details:*
InstantForum.NET has a security problem. It can be exploited by XSS attacks.

*(2.1)* The first vulnerability occurs at “Join.aspx” page with "SessionID"
parameter of it.

*(2.2)* The second vulnerability occurs at “Logon.aspx” page with
"SessionID" parameter of it.


Wang Jing,
Division of Mathematical Sciences (MAS),
School of Physical and Mathematical Sciences (SPMS),
Nanyang Technological University (NTU),

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