WordPress WassUp Plugin "User-Agent" HTTP Header Script Insertion Vulnerability

Secunia ID	SA49225
CVE-ID	CVE-2012-2633
Release Date	18 May 2012
Last Change	06 Jun 2012
Criticality	Moderately Critical
Solution Status	Vendor Patch
Software	WordPress WassUp Plugin 1.x
Where	From remote
Impact	Cross-Site Scripting Cross-Site Scripting vulnerabilities allow a third party to manipulate the content or behaviour of a web application in a user's browser, without compromising the underlying system. Different Cross-Site Scripting related vulnerabilities are also classified under this category, including "script insertion" and "cross-site request forgery". Cross-Site Scripting vulnerabilities are often used against specific users of a website to steal their credentials or to conduct spoofing attacks.
Description	A vulnerability has been discovered in the WassUp plugin for WordPress, which can be exploited by malicious people to conduct script insertion attacks. Input passed via the "User-Agent" HTTP header is not properly sanitised before being used. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious data is being viewed. The vulnerability is confirmed in version 1.8.3. Prior versions may also be affected.
Solution	Update to version 1.8.3.1.
Reported by	JVN credits Yuji Tounai, bogus.jp.
Original Advisory	WassUp: http://wordpress.org/extend/plugins/wassup/changelog/ http://plugins.trac.wordpress.org/changeset/545369/wassup JVN: http://jvn.jp/en/jp/JVN15646988/index.html http://jvndb.jvn.jp/en/contents/2012/JVNDB-2012-000058.html

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