Remarkable is a markdown parser. In versions 1.6.2 and lower, remarkable allows the use of data: URIs in links and can therefore execute javascript.
data:
{ "versions": [ { "introduced": "0" }, { "last_affected": "1.6.2" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-16006.json"