{“lastseen”:””,”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.”,”published”:”2025-12-01T22:17:42.705Z”,”modified”:”2025-12-01T22:17:42.705Z”,”type”:”cve”,”title”:”mdast-util-to-hast unsanitized class attribute”,”source”:”GitHub_M”,”references”:”https:\/\/github.com\/syntax-tree\/mdast-util-to-hast\/security\/advisories\/GHSA-4fh9-h7wg-q85m\\nhttps:\/\/github.com\/syntax-tree\/mdast-util-to-hast\/commit\/6fc783ae6abdeb798fd5a68e7f3f21411dde7403\\nhttps:\/\/github.com\/syntax-tree\/mdast-util-to-hast\/commit\/ab3a79570a1afbfa7efef5d4a0cd9b5caafbc5d7″,”id”:”CVE-2025-66400″,”bulletinFamily”:””,”cwe”:[“CWE-20″,”CWE-915″],”cvelist”:null,”sourceData”:”syntax-tree mdast-util-to-hast \\u003e= 13.0.0, \\u003c 13.2.1″,”sourceHref”:””,”cvss”:{“score”:6.9,”severity”:”MEDIUM”,”vector”:”CVSS:4.0\/AV:N\/AC:L\/AT:N\/PR:N\/UI:N\/VC:N\/VI:L\/VA:N\/SC:N\/SI:N\/SA:N”,”version”:”4.0″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”mdast-util-to-hast”,”version”:”\\u003e= 13.0.0, \\u003c 13.2.1″,”vendor”:”syntax-tree”,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:””,”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…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,48,12,21,13,7,11,5],"class_list":["post-28215","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-69","tag-exploit","tag-medium","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n