WordPress Black-LetterHead Theme 'index.php' Cross Site Scripting Vulnerability

Bugtraq ID:	49879
Class:	Input Validation Error
CVE:	CVE-2011-3865
Remote:	Yes
Local:	No
Published:	Sep 30 2011 12:00AM
Updated:	Sep 30 2011 12:00AM
Credit:	SiteWatch
Vulnerable:	WordPress Black-LetterHead 1.5
Not Vulnerable:	WordPress Black-LetterHead 1.6

WordPress Black-LetterHead Theme 'index.php' Cross Site Scripting Vulnerability

The Black-LetterHead theme for WordPress 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 can allow the attacker to steal cookie-based authentication credentials and launch other attacks.

Black-LetterHead theme 1.5 is vulnerable; prior versions may also be affected.

WordPress Black-LetterHead Theme 'index.php' Cross Site Scripting Vulnerability

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

The following example URI is available:

http://www.example.com/index.php/%22+%3E%3C/form%3E%3CScRiPt%3Exss=69566599%3C/ScRiPt%3E/t Post Request:s=1&

WordPress Black-LetterHead Theme 'index.php' Cross Site Scripting Vulnerability

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

WordPress Black-LetterHead Theme 'index.php' Cross Site Scripting Vulnerability

References:

• WordPress Homepage (WordPress)
  
• XSS in Wordpress Theme - Black-LetterHead (Sitewatch)