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

CVE ID : CVE-2025-66400 Published : Dec. 1, 2025, 11:15 p.m. | 40 minutes ago 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. Severity: 6.9 | MEDIUM Visit the link for more details, such as CVSS details, affected products, timeline, and more...

Source: Telegram CVE Monitor