OPAC KpwinSQL Cross Site Scripting / Local File Inclusion

`OPAC KpwinSQL LFI/XSS Vulnerabilities  
  
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Product Website : http://www.kpsys.cz/  
Affected version: All  
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Description:   
KpwinSQL suffers from an unauthenticated file inclusion vulnerability (LFI) when input passed thru the 'lang' parameter to the following scripts which are not properly verified:  
+ index.php  
+ help.php  
+ logpin.php  
+ brow.php  
+ indexs.php  
+ search.php  
+ hledani.php  
+ hled_hesl.php  
before being used to include files. This can be exploited to include files from local resources with their absolute path and with directory traversal attacks.  
  
Moreover, KpwinSQL system suffers from Cross Site Scripting vulnerability when input passed thru the 'vyhl' parameter to 'index.php' script which does not perform input validation.  
  
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Tested on: Apache/2.2.11 (Win32)  
PHP/5.2.9-2  
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Vulnerabilities discovered by Yakir Wizman  
https://www.linkedin.com/in/yakirwizman  
Date: 06.07.2016  
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Proof Of Concept:  
  
Local File Inclusion example:  
http://server/index.php?lang=..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2fwindows%2fwin.ini%00  
  
Cross Site Scripting example:  
http://server/index.php?vyhl='><script>alert('XSS')</script>&lang=cze  
  
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