WordPress Knews Multilingual Newsletters Plugin "ff" Cross-Site Scripting Vulnerability

SA49825

06 Jul 2012

10 Jul 2012

Less Critical

Vendor Patch

WordPress Knews Multilingual Newsletters Plugin 1.x

From remote

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.

Sammy Forgit has discovered a vulnerability in the Knews Multilingual Newsletters plugin for WordPress, which can be exploited by malicious people to conduct cross-site scripting attacks.

Input passed via the "ff" parameter to wp-content/plugins/knews/wysiwyg/fontpicker/index.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.

The vulnerability is confirmed in version 1.1.0. Other versions may also be affected.

Update to version 1.1.1.

Sammy Forgit, OpenSysCom.

Knews Multilingual Newsletters:
http://wordpress.org/extend/plugins/knews/changelog/
http://plugins.trac.wordpress.org/changeset/569277/knews

OpenSysCom:
http://www.opensyscom.fr/Actualites/wordpress-plugins-knews-multilingual-newsletters-xss-vulnerability.html