There is a potential cross-site scripting (XSS) vulnerability that can be exploited via maliciously crafted user data.
Our filter to detect and prevent the use of the javascript:
URL scheme in the href
attribute of an <a>
tag could be bypassed with tab \t
or newline \n
characters between the characters of the protocol, e.g. java\tscript:
.
If you render an <a>
tag with an href
attribute set to a user-provided link, that link could potentially execute JavaScript when clicked by another user.
a(href: user_profile) { "Profile" }
The best way to mitigate this vulnerability is to update to one of the following versions:
Configuring a Content Security Policy that does not allow unsafe-inline
would effectively prevent this vulnerability from being exploited.