There is a potential cross-site scripting (XSS) vulnerability that can be exploited via maliciously crafted user data. This was due to improper case-sensitivity in the code that was meant to prevent these attacks.
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" }
If you splat user-provided attributes when rendering any HTML or SVG tag, malicious event attributes could be included in the output, executing JavaScript when the events are triggered by another user.
h1(**JSON.parse(user_attributes))
Patches are available on RubyGems for all 1.x
minor versions. The patched versions are:
If you are on main
, it has been patched since aa50c60
Configuring a Content Security Policy that does not allow unsafe-inline
would effectively prevent this vulnerability from being exploited.
In addition to upgrading to a patched version of Phlex, we strongly recommend configuring a Content Security Policy header that does not allow unsafe-inline
. Here’s how you can configure a Content Security Policy header in Rails. https://guides.rubyonrails.org/security.html#content-security-policy-header
{ "nvd_published_at": "2024-03-11T23:15:47Z", "cwe_ids": [ "CWE-79" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2024-03-12T15:39:46Z" }