WebSVN 2.3.3 Cross Site Scripting

`Title: WebSVN - Reflected Cross-Site Scripting  
Author: Jakub Palaczynski  
Date: 22. February 2016  
CVE: CVE-2016-2511  
  
Affected software:  
==================  
  
WebSVN 2.3.3  
Older versions are probably also vulnerable.  
  
Description:  
============  
  
WebSVN offers a view onto your subversion repositories that's been designed  
to reflect the Subversion methodology. You can view the log of any file or  
directory and see a list of all the files changed, added or deleted in any  
given revision. You can also view the differences between two versions of a  
file so as to see exactly what was changed in a particular revision.[1]  
  
  
Vulnerability:  
**************  
  
Reflected Cross-Site Scripting:  
===============================  
  
Proof of Concept:  
http://host/websvn/log.php?path=%00"><script>alert(document.domain)</script>  
  
Fix:  
It is adviced to change following line in include/setup.php file:  
$path = !empty($_REQUEST['path']) ? $_REQUEST['path'] : null;  
to:  
$path = !empty($_REQUEST['path']) ? escape($_REQUEST['path']) : null;  
  
"escape" function that is used to patch vulnerability was written by the  
author and can be found in include/command.php file.  
  
Reference:  
==========  
  
[1] Why WebSVN?:  
http://www.websvn.info/  
  
Contact:  
========  
  
Jakub[dot]Palaczynski[at]ingservicespolska[dot]pl  
  
  
`