Secunia

Description
Some vulnerabilities have been discovered in e107, which can be exploited by malicious people to conduct cross-site request forgery attacks and malicious users to conduct script insertion attacks.

1) The application allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. This can be exploited to manipulate site settings (e.g. modify user permissions) or add a new news category with a specially crafted name and thus conduct script insertion attacks by enticing a logged in administrator to visit a malicious web page.

2) Input passed to the "userclass_name" and "userclass_description" parameters in e107_admin/userclass2.php is not properly sanitised before being used. This can be exploited to insert arbitrary HTML and script code, which may be executed in a user's browser session in the context of an affected site if the malicious user class is viewed.

The vulnerabilities are confirmed in version 0.7.16. Other versions may also be affected.

Solution
Update to version 0.7.22 or later.

Provided and/or discovered by
Russ McRee

Changelog
Further details available in Customer Area

Original Advisory
HIO-2009-0305:
http://holisticinfosec.org/content/view/104/45/

Deep Links
Links available in Customer Area