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TITLE:
Pligg Cross-Site Scripting and Cross-Site Request Forgery

SECUNIA ADVISORY ID:
SA37349

VERIFY ADVISORY:
http://secunia.com/advisories/37349/

DESCRIPTION:
Russ McRee has discovered some vulnerabilities in Pligg, which can be
exploited by malicious people to conduct cross-site scripting and
request forgery attacks.

1) Input passed via the "Referer" HTTP header to various scripts
(e.g. admin/admin_config.php, admin/admin_modules.php, delete.php,
editlink.php, submit.php, submit_groups.php,
user_add_remove_links.php, and user_settings.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.

2) The application allows users to perform certain actions via HTTP
requests without performing any validity checks to verify the
requests. This can be exploited to e.g. create an arbitrary user with
administrative privileges if a logged-in administrative user visits a
malicious web site.

The vulnerabilities are confirmed in version 1.0.2. Other versions
may also be affected

NOTE: Two other weaknesses related to redirection to external sites
were also confirmed.

SOLUTION:
Both vulnerabilities along with one of the redirection weaknesses are
fixed in version 1.0.3.

PROVIDED AND/OR DISCOVERED BY:
Reported by Russ McRee via Secunia.

ORIGINAL ADVISORY:
Pligg:
http://www.pligg.com/blog/775/pligg-cms-1-0-3-release/

HolisticInfoSec:
http://holisticinfosec.org/content/view/130/45/

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