How severe is CVE-2019-17490?

CVE-2019-17490 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-17490 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-17490?

CVE-2019-17490 affects Jnoj Jiangnan Online Judge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-17490?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-17490 published?

CVE-2019-17490 was published on 2019-10-10 and last updated on 2026-06-17.

CVE-2019-17490

CVE-2019-17490 is a high-severity vulnerability in Jnoj Jiangnan Online Judge with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Jnoj Jiangnan Online Judge
Published: 2019-10-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2019-17490?: 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.
How severe is CVE-2019-17490?: CVE-2019-17490 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-17490 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-17490?: CVE-2019-17490 affects Jnoj Jiangnan Online Judge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-17490?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-17490 published?: CVE-2019-17490 was published on 2019-10-10 and last updated on 2026-06-17.

References

https://github.com/shi-yang/jnoj/issues/51

Affected products (1)

cpe:2.3:a:jnoj:jiangnan_online_judge:0.8.0:*:*:*:*:*:*:*

More vulnerabilities in Jnoj Jiangnan Online Judge

CVE-2019-17538 — High (CVSS 7.5): Jiangnan Online Judge (aka jnoj) 0.8.0 has Directory Traversal for file reading via the…
CVE-2019-17537 — High (CVSS 7.5): Jiangnan Online Judge (aka jnoj) 0.8.0 has Directory Traversal for file deletion via the…
CVE-2019-17493 — Medium (CVSS 6.1): Jiangnan Online Judge (aka jnoj) 0.8.0 has XSS via the Problem[sample_input] parameter to web/admin/problem/create or…
CVE-2019-17491 — Medium (CVSS 6.1): Jiangnan Online Judge (aka jnoj) 0.8.0 has XSS via the Problem[description] parameter to web/admin/problem/create or…
CVE-2019-17489 — Medium (CVSS 6.1): Jiangnan Online Judge (aka jnoj) 0.8.0 has XSS via the Problem[title] parameter to web/polygon/problem/create or…

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