Contao CMS Cross-Site Scripting Vulnerability

Bugtraq ID:	50061
Class:	Input Validation Error
CVE:	CVE-2011-4335
Remote:	Yes
Local:	No
Published:	Oct 11 2011 12:00AM
Updated:	Dec 01 2011 05:56PM
Credit:	Stefan Schurtz
Vulnerable:	Leo Feyer Contao 2.10.1
Not Vulnerable:	Leo Feyer Contao 2.10.2

Contao CMS Cross-Site Scripting Vulnerability

Contao is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input.

An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials and to launch other attacks.

Contao 2.10.1 is vulnerable; other versions may also be affected.

Contao CMS Cross-Site Scripting Vulnerability

Attackers can exploit this issue by enticing an unsuspecting user to follow a malicious URI.

The following example is available:

• /data/vulnerabilities/exploits/50061.txt

Contao CMS Cross-Site Scripting Vulnerability

Solution:
Vendor updates are available. Please see the references for details.

Contao CMS Cross-Site Scripting Vulnerability

References:

• Contao Homepage (Leo Feyer)
  
• Fix for the potential XSS vulnerability (Contao)
  
• Contao 2.10.1 Cross-site scripting vulnerability ([email protected])
  
• Contao 2.10.1 Cross-site scripting vulnerability (Stefan Schurtz)