FortiOS SSL VPN webportal user credentials present in plain text in client side javascript file

An information disclosure vulnerability exists in the SSL-VPN web portal of FortiOS: when pages bookmarked in the web portal use the Single sign-on (SSO) feature, the user’s webportal’s login and password are included in a javascript file sent client-side.
The leaked credential may potentially be captured by an attacker if additional session handling, access control or cross-site scripting vulnerabilities were to be discovered in the SSL-VPN web portal, or in the applications within (or in case of client-side vulnerabilities, in the user’s browser).