simple-markdown.js in Khan Academy simple-markdown before 0.4.4 allows XSS via a data: or vbscript: URI.
{ "versions": [ { "introduced": "0" }, { "fixed": "0.4.4" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9844.json"
[ { "events": [ { "introduced": "0" }, { "last_affected": "30" } ] } ]