[wp-hackers] FW: WordPress XSS under function wp_title()

[Ross M. W. Bennetts]

-----Original Message-----
From: g30rg3_x [mailto:g30rg3x at gmail.com] 
Sent: Saturday, 10 March 2007 9:16 AM
To: bugtraq at securityfocus.com
Subject: WordPress XSS under function wp_title()

_____________
ChX Security |
Advisory #1  |
=============

->    "WordPress XSS under function wp_title()"    <-

______
 Data |
======
Author: g30rg3_x <g30rg3x_at_gmail_dot_com>
Program: WordPress <http://wordpress.org/>
Severity: Less Critical.
Type of Advisory: Mid Disclosure.
Affected/Tested Versions:
 -> Series 2.0.x: <= 2.0.10-alpha
 -> Series 2.1.x: <= 2.1.3-alpha
 -> Series SVN latest: <= 2.2-bleeding (Revision 5002)

____________________
Program Description |
====================
WordPress is a state-of-the-art semantic personal publishing platform
with a focus on aesthetics, web standards, and usability.
What a mouthful. WordPress is both free and priceless at the same time.
More simply, WordPress is what you use when you want to work with your
blogging software, not fight it.

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Overview |
=========
The query variable "year" inside the function "wp_title", its not sanitized
so it allows a non persistent cross site scripting attack.

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WorkAround |
===========
$title takes the value in raw (without any type of filter) of $year which is
an
a query variable, that can be filled with any web browser via a simply
GET parameter.

________________
Proof Of Concept|
================
ChX Security will not release any proof of concept.

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Solution/Fix|
============
The lastest SVN Revision (greater than revision 5002) has alredy fixed
this bug...
http://trac.wordpress.org/changeset/5003

For series 2.1.x and 2.0.x, the vendor will fix this in the next set
of dot releases.

______
Dates |
======
Bug Found: 2/03/2007
Vendor Contact: 3/03/2007
Vendor Response: 7/03/2007
Public Disclosure: 9/03/2007
_______
Shouts |
=======
Paisterist, NitRic, HaCkZaTaN, PescaoDeth, alex_hk23 and all mexican white
hats.
White Hat Powa.

            ChX Security
       http://chxsecurity.org/
             (c) 2007

-- 
Copy: http://chxsecurity.org/advisories/adv-1-mid.txt
_________________________
             g30rg3_x