Vichan is the most popular and widely used imageboard software in the world. It is a free, light-weight, fast, highly configurable and user-friendly imageboard software package.
CSP allows to block XSS attacks by preventing the execution of unauthorized javascript or css inside a html page.
While vichan should already be compatible with CSP's basic form, it's not currently possible to set the policy to it's strictest form as vichan's includes inline javascript and stylesheets.
https://infosec.mozilla.org/guidelines/web_security#content-security-policy
CSP allows to block XSS attacks by preventing the execution of unauthorized javascript or css inside a html page. While vichan should already be compatible with CSP's basic form, it's not currently possible to set the policy to it's strictest form as vichan's includes inline javascript and stylesheets.