The Chartkick gem through 3.3.2 for Ruby allows Cascading Style Sheets (CSS) Injection (without attribute).
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16254
Reference (s):
- https://github.com/ankane/chartkick
- https://github.com/ankane/chartkick/issues/546

