A vulnerability has been discovered in SquirrelMail, which can be exploited by malicious people to conduct cross-site request forgery attacks.

The application allows users to perform certain actions via HTTP requests without performing any validation checks to verify the requests. This can be exploited to e.g. change user preferences, delete emails, and potentially send emails when a logged-in user visits a malicious web page.

The vulnerabilities are confirmed in version 1.4.17. Other versions may also be affected.

Solution
Update to version 1.4.20.

Provided and/or discovered by
Independently reported by:
* Mike Bailey
* Jaykishan Nirmal and Kishor Sonawane

Additional information regarding incomplete fix provided by Secunia Research.

Changelog
Further details available to Secunia VIM customers

Original Advisory
http://www.squirrelmail.org/security/issue/2009-08-12

Deep Links
Links available to Secunia VIM customers