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 …
Published: 2025-12-01 · CVSS: 6.9 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7