CyberSolutions CyberMail Pre-Auth Open Redirect

Current Description

An Open Redirect vulnerability for all browsers in in CyberMail version 5 or later version, which will redirect to a malicious site without authentication. 

This vulnerability affects many mail system of governments, organizations, companies and universities.


The injection point is ACTION parameter in "/cgi-bin/go".

We execute arbitrary code via ACTION parameter without authentication.


It could allow an unauthenticated, remote attacker to redirect a user to a malicious web page.

Affected files

http://`[Target Domain]`/cgi-bin/go


  • Tony Kuo (CHT Security)