CVSS Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Cookies that are not marked as secure can be transferred via an unencrypted connection. A man-in-the-middle attack can be used to get the contents of these cookies.
Cookies that are not marked as http-only can be read by local scripts. In case of an Cross-Site-Scripting (XSS) attack, an attacker is able to read these cookies.
Depending on the cookie content, think of enabling both settings for all cookies. This is especially important for session cookies.
To set cookies to secure and httponly, you need to configure the web framework which issues the cookies. Follow these guides for the correct settings:
In PHP configure the cookie settings for all delivered websites. Set the following in your /etc/php/php.ini file:
session.cookie_secure = 1
session.cookie_httponly = 1
In django, make the following cookie settings in you projects preferences file: