[SA18219] MediaWiki Hardcoded Placeholder String Security Bypass Vulnerability

TITLE:
MediaWiki Hardcoded Placeholder String Security Bypass Vulnerability

SECUNIA ADVISORY ID:
SA18219

VERIFY ADVISORY:
http://secunia.com/advisories/18219/

CRITICAL:
Less critical

IMPACT:
Security Bypass, Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
MediaWiki 1.x
http://secunia.com/product/2546/

DESCRIPTION:
A vulnerability has been reported in MediaWiki, which can be
exploited by malicious users to bypass certain security restrictions
and conduct script insertion attacks.

The vulnerability is caused due to the presence of a hardcoded
internal placeholder string. This can be exploited to bypass certain
security checks on inline style attributes and inject arbitrary
JavaScript code, which will be executed in a user's browser session
in context of an affected site when the malicious user data is viewed
with the Microsoft Internet Explorer browser.

The vulnerability has been reported in version 1.5.3. Prior versions
may also be affected.

SOLUTION:
Update to version 1.5.4.
http://www.mediawiki.org/wiki/Download

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

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

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

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