GNUBOARD5 5.3.1.9 has XSS that allows remote attackers to inject arbitrary web script or HTML via the "Extra Contents" parameter, aka the adm/configformupdate.php cf_1~10 parameter.
{ "versions": [ { "introduced": "0" }, { "last_affected": "5.3.1.9" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-18670.json"