{"action":"Upgrade mdast-util-to-hast to 13.2.1 or later.","affected":[{"fixed":"13.2.1","introduced":"13.0.0"}],"component":"mdast-util-to-hast","cve_ids":["CVE-2025-66400"],"ecosystem":"npm","epss":0.00305,"exploited":false,"fixed_versions":["13.2.1"],"ghsa_id":"GHSA-4fh9-h7wg-q85m","id":"tcs_01M5KF083295JNAHQ22VPCBM7F","modified_at":"2026-09-10T03:50:31.288154267Z","published_at":"2025-12-02T01:25:46Z","references":["https://osv.dev/vulnerability/GHSA-4fh9-h7wg-q85m","https://github.com/syntax-tree/mdast-util-to-hast/security/advisories/GHSA-4fh9-h7wg-q85m","https://nvd.nist.gov/vuln/detail/CVE-2025-66400","https://github.com/syntax-tree/mdast-util-to-hast/commit/6fc783ae6abdeb798fd5a68e7f3f21411dde7403","https://github.com/syntax-tree/mdast-util-to-hast/commit/ab3a79570a1afbfa7efef5d4a0cd9b5caafbc5d7","https://github.com/syntax-tree/mdast-util-to-hast"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-4fh9-h7wg-q85m","url":"https://osv.dev/vulnerability/GHSA-4fh9-h7wg-q85m"}],"summary":"mdast-util-to-hast has unsanitized class attribute"}