eXV2 Content Management System 2.10 Cross Site Scripting

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eXV² Content Management System 2.10 Remote XSS Vulnerability  
  
  
Vendor: eXV² Team  
Product web page: http://www.exv2.de  
Affected version: 2.10 (LiveCD)  
  
Summary: eXV² is a free CMS for building and operating private  
home pages, small and large communities and it's also easily  
used for small to medium business presences.  
  
Desc: The CMS suffers from a remote reflected Cross-Site Scripting  
vulnerability when input passed thru "rssfeedURL" and "sumb" parameter  
in "archive.php", "topics.php", "example.php" and "index.php" is not  
sanitized, allowing the attacker to execute arbitrary HTML and script  
code in a user's browser session and aid in phishing attacks.  
  
Tested on: Microsoft Windows XP Pro (EN)  
Apache 2.2.14 (Win32)  
MySQL 5.1.41  
PHP 5.3.1  
  
Vendor status: [09.10.2010] Vulnerability discovered.  
[10.10.2010] Contact with the vendor.  
[14.10.2010] No reply from vendor.  
[15.10.2010] Public advisory released.  
  
Vulnerability discovered by: Gjoko 'LiquidWorm' Krstic  
liquidworm gmail com  
Zero Science Lab - http://www.zeroscience.mk  
  
Advisory ID: ZSL-2010-4970  
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2010-4970.php  
  
PoC:  
  
http://127.0.0.1:4001/manual/caferss/example.php?rssfeedURL="%20onmouseover=prompt(1)%20xss="&submit=OK  
http://127.0.0.1:4001/modules/news/archive.php?subm="><script>alert(1)</script>  
http://127.0.0.1:4001/modules/news/topics.php?subm="><script>alert(1)</script>  
http://127.0.0.1:4001/modules/contact/index.php?op=contact&subm="><script>alert(1)</script>  
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