CVE-2025-66400

Published December 1st, 2025

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CVSS v3

5.3

MEDIUM

CVSS v2

N/A

Affected

PROJECT

Description

mdast-util-to-hast is an mdast utility to transform to hast. From 13.0.0 to before 13.2.1, multiple (unprefixed) classnames could be added in markdown source by using character references. This could make rendered user supplied markdown code elements appear like the rest of the page. This vulnerability is fixed in 13.2.1.

syntax-tree/mdast-util-to-hast

utility to transform mdast to hast

GitHub

121