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Category:   Application (Generic)  >   WordPress Vendors:   wordpress.org
WordPress Input Validation Hole in Processing 'HTTP_HOST' HTTP Header Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1021286
SecurityTracker URL:  http://securitytracker.com/id/1021286
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Nov 26 2008
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): prior to 2.6.5
Description:   A vulnerability was reported in WordPress. A remote user can conduct cross-site scripting attacks.

The system does not properly filter HTML code from user-supplied input in the 'HTTP_HOST' header parameter before displaying the input. A remote user can submit a specially value to cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the WordPress software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

The vulnerability resides in 'wp-includes/feed.php' and 'wp-includes/version.php'.

Only systems running on IP-based virtual servers with Apache 2.x are affected.

Jeremias Reith reported this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the WordPress software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution:   The vendor has issued a fixed version (2.6.5).

The vendor's advisory is available at:

http://wordpress.org/development/2008/11/wordpress-265/

Vendor URL:  www.wordpress.org/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


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