Arbitrary Class Instantiation Vulnerability in Kramdown before 2.3.1

Arbitrary Class Instantiation Vulnerability in Kramdown before 2.3.1

CVE-2021-28834 · CRITICAL Severity

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

Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated.

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