CVE-2025-66400

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...

CVE-2025-66400 mdast-util-to-hast unsanitized class attribute

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...