CVE-2024-28199 – phlex

Package

Manager: gem
Name: phlex
Vulnerable Version: =1.9.0 || >=1.9.0 <1.9.1 || >=1.8.0 <1.8.2 || =1.7.0 || >=1.7.0 <1.7.1 || >=1.6.0 <1.6.2 || >=1.5.0 <1.5.2 || =1.4.0 || >=1.4.0 <1.4.1 || >=1.3.0 <1.3.3 || >=1.2.0 <1.2.2 || =1.1.0 || >=1.1.0 <1.1.1 || >=0 <1.0.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

EPSS: 0.01182 pctl0.77968

Details

Cross-site Scripting (XSS) possible with maliciously formed HTML attribute names and values in Phlex 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. ### Impact 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. ```ruby 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. ```ruby h1(**JSON.parse(user_attributes)) ``` ### Patches Patches are [available on RubyGems](https://rubygems.org/gems/phlex) for all `1.x` minor versions. The patched versions are: - [1.9.1](https://rubygems.org/gems/phlex/versions/1.9.1) - [1.8.2](https://rubygems.org/gems/phlex/versions/1.8.2) - [1.7.1](https://rubygems.org/gems/phlex/versions/1.7.1) - [1.6.2](https://rubygems.org/gems/phlex/versions/1.6.2) - [1.5.2](https://rubygems.org/gems/phlex/versions/1.5.2) - [1.4.1](https://rubygems.org/gems/phlex/versions/1.4.1) - [1.3.3](https://rubygems.org/gems/phlex/versions/1.3.3) - [1.2.2](https://rubygems.org/gems/phlex/versions/1.2.2) - [1.1.1](https://rubygems.org/gems/phlex/versions/1.1.1) - [1.0.1](https://rubygems.org/gems/phlex/versions/1.0.1) If you are on `main`, it has been patched since [`aa50c60`](https://github.com/phlex-ruby/phlex/commit/aa50c604cdee1d0ce7ef068a4c66cbd5d43f96a1) ### Workarounds Configuring a [Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy) that does not allow [`unsafe-inline`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline) would effectively prevent this vulnerability from being exploited. ### References 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

Metadata

Created: 2024-03-12T15:39:46Z
Modified: 2024-03-14T21:40:41Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/03/GHSA-242p-4v39-2v8g/GHSA-242p-4v39-2v8g.json
CWE IDs: ["CWE-79"]
Alternative ID: GHSA-242p-4v39-2v8g
Finding: F008
Auto approve: 1