CyberSolutions CyberMail Webmail Pre-Auth Cross-Site Scripting

Current Description

The "/cgi-bin/go" page in CyberMail version 5 or later version has a cross-site scripting (XSS) vulnerability, allowing execution of arbitrary code via ACTION parameter without authentication. 

The code can executed for any user accessing the page. 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 paramemer without authentication.


We can execute arbitrary code without authentication.

Affected files

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


  • Tony Kuo (CHT Security)