Faveo Helpdesk Enterprise 6.0.1 - XSS

Description

Faveo Helpdesk Enterprise version 6.0.1 allows an attacker with agent permissions to perform privilege escalation on the application. This occurs because the application is vulnerable to stored XSS.

Vulnerability

The application allows an agent to upload HTML code when attempting to upload an image in the agent signature.

The bad thing here is that we cannot access the session cookie from JS. This is because the cookie has the HttpOnly flag. However, thanks to XSS we can perform actions on behalf of an administrator, we can create users with administrative permissions.

Exploitation

Thanks to XSS and the possibility of creating users with administrative permissions. A malicious agent can send a malicious link to the instance administrator to create an account with administrative permissions, thus managing to elevate privileges in the application.

Our security policy

We have reserved the CVE-2023-1724 to refer to this issue from now on. Disclosure policy

System Information

• Version: Faveo Helpdesk Enterprise 6.0.1

• Operating System: GNU/Linux

Mitigation

There is currently no patch available for this vulnerability.

References

• Vendor page https://github.com/ladybirdweb/faveo-helpdesk/