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TITLE:
PHP-Nuke MyHeadlines Module "myh_op" Cross-Site Scripting

SECUNIA ADVISORY ID:
SA21653

VERIFY ADVISORY:
http://secunia.com/advisories/21653/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
MyHeadlines 4.x (module for PHP-Nuke)
http://secunia.com/product/11722/

DESCRIPTION:
Thomas Pollet has discovered a vulnerability in the MyHeadlines
module for PHP-Nuke, which can be exploited by malicious people to
conduct cross-site scripting attacks.

Input passed to the "myh_op" parameter in modules.php is not properly
sanitised before being returned to the user. This can be exploited to
execute arbitrary HTML and script code in a user's browser session in
context of an affected site.

Example:
http://[host]/modules.php?op=modload&name=MyHeadlines&file=index&myh=user&myh_op=show_all[code]&eid=2474

The vulnerability has been confirmed in version 4.3.1. Other versions
may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
Thomas Pollet

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