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Vulnerability record · CVE-2019-17490 · published 10 October 2019

CVE-2019-17490: Jnoj jiangnan online judge unrestricted file upload vulnerability

Jnoj · Jiangnan Online Judge

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.

8.8 CVSS 3.1 High EPSS 1.5% · top 26.9% CWE-434 · Unrestricted file upload
8.8CVSS 3.1 base score, v2 6.5
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/shi-yang/jnoj/issues/51 ExploitThird Party Advisory
https://github.com/shi-yang/jnoj/issues/51 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2019-17537Jnoj jiangnan online judge path traversal vulnerabilityJiangnan Online Judge (aka jnoj) 0.8.0 has Directory Traversal for file deletion via the web/polygon/problem/deletefile?id=1&name=../ substring.EPSS 1.6%7.5CVE-2019-17538Jnoj jiangnan online judge path traversal vulnerabilityJiangnan Online Judge (aka jnoj) 0.8.0 has Directory Traversal for file reading via the web/polygon/problem/viewfile?id=1&name=../ substring.EPSS 11%6.1CVE-2019-17489Jnoj jiangnan online judge cross-site scripting vulnerabilityJiangnan Online Judge (aka jnoj) 0.8.0 has XSS via the Problem[title] parameter to web/polygon/problem/create or web/polygon/problem/update or web/ad…EPSS 1.1%6.1CVE-2019-17491Jnoj jiangnan online judge cross-site scripting vulnerabilityJiangnan Online Judge (aka jnoj) 0.8.0 has XSS via the Problem[description] parameter to web/admin/problem/create or web/polygon/problem/update.EPSS 1.1%6.1CVE-2019-17493Jnoj jiangnan online judge cross-site scripting vulnerabilityJiangnan Online Judge (aka jnoj) 0.8.0 has XSS via the Problem[sample_input] parameter to web/admin/problem/create or web/polygon/problem/update.EPSS 1.1%10.0CVE-2026-56291Balbooa Forms Joomla extension unauthenticated arbitrary file upload RCEThe Balbooa Forms extension for Joomla before version 2.4.1 accepts file uploads without authentication and does not restrict file type, allowing exe…KEVEPSS 15%analysed10.0CVE-2026-48939iCagenda Joomla extension unrestricted file upload leads to PHP RCEThe iCagenda extension for Joomla fails to restrict file types in its file attachment feature, allowing arbitrary file uploads that result in PHP cod…KEVEPSS 20%analysed10.0CVE-2026-56290Joomla Page Builder CK unauthenticated file upload leads to RCEThe Joomla Page Builder CK extension before 3.6.0 allows unauthenticated arbitrary file uploads, letting an attacker place executable files on the se…KEVEPSS 31%analysed

Source: NIST National Vulnerability Database (record CVE-2019-17490), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.