app\modules\polygon\controllers\ProblemController in Jiangnan Online Judge (aka jnoj) 0.8.0 allows arbitrary file upload, as demonstrated by PHP code (with a .php filename but the image/png content type) to the web/polygon/problem/tests URI.
{ "versions": [ { "introduced": "0" }, { "last_affected": "0.8.0" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-17490.json"