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TITLE:
phpBB Signature Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA14475

VERIFY ADVISORY:
http://secunia.com/advisories/14475/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
phpBB 2.x
http://secunia.com/product/463/

DESCRIPTION:
Paisterist has reported a vulnerability in phpBB, which can be
exploited by malicious users to conduct script insertion attacks.

Input passed in a signature is not properly sanitised before being
used in "privmsg.php" and "viewtopic.php". This can be exploited to
inject arbitrary HTML and script code, which will be executed in a
user's browser session in context of an affected site when the
malicious user data is viewed.

The vulnerability has been reported in version 2.0.13. Other versions
may also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
Paisterist

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