CVE-2019-17490: Jnoj Jiangnan Online Judge

High severity, CVSS 8.8. EPSS: 1.5% chance of exploitation in the next 30 days.

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.

Affected products

• Jnoj Jiangnan Online Judge: version 0.8.0 only

Published 2019-10-10. Last modified 2026-06-17.