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From:SECUNIA <support_(at)_secunia.com>
Date:12 января 2007 г.
Subject:[SA23656] b2evolution "redirect_to" HTML Attribute Cross-Site Scripting


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Secunia is proud to announce the availability of the Secunia Software
Inspector.

The Secunia Software Inspector is a free service that detects insecure
versions of software that you may have installed in your system. When
insecure versions are detected, the Secunia Software Inspector also
provides thorough guidelines for updating the software to the latest
secure version from the vendor.

Try it out online:
http://secunia.com/software_inspector/

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TITLE:
b2evolution "redirect_to" HTML Attribute Cross-Site Scripting

SECUNIA ADVISORY ID:
SA23656

VERIFY ADVISORY:
http://secunia.com/advisories/23656/

CRITICAL:
Not critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
b2evolution 1.x
http://secunia.com/product/12768/

DESCRIPTION:
unsticky has discovered a vulnerability in b2evolution, which can be
exploited by malicious people to conduct cross-site scripting
attacks.

Input passed to the "redirect_to" parameter in htsrv/login.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.

Successful exploitation allows adding additional attributes (e.g.
"onMouseOver") to the "Bypass login..." link.

The vulnerability is confirmed in version 1.8.6. Other versions may
also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
unsticky

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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