CVE-2020-14001: rubygem-kramdown: processing template options inside documents allows unintended read access or embedded Ruby code execution

Severity: Critical

CVSS Score: 9.8

The kramdown gem before 2.3.0 for Ruby processes the template option inside Kramdown documents by default, which allows unintended read access (such as template="/etc/passwd") or unintended embedded Ruby code execution (such as a string that begins with template="string://<%= `). NOTE: kramdown is used in Jekyll, GitLab Pages, GitHub Pages, and Thredded Forum.