How severe is CVE-2018-16367?

CVE-2018-16367 has a CVSS 3.x base score of 9.9, rated critical 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-2018-16367 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16367?

CVE-2018-16367 affects Qduoj Onlinejudge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-16367?

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

When was CVE-2018-16367 published?

CVE-2018-16367 was published on 2018-09-02 and last updated on 2026-06-17.

CVE-2018-16367

CVE-2018-16367 is a critical-severity vulnerability in Qduoj Onlinejudge with a CVSS 3.x base score of 9.9. 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-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
CVSS v2: 9.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Qduoj Onlinejudge
Published: 2018-09-02
Last modified: 2026-06-17

Description

In OnlineJudge 2.0, the sandbox has an incorrect access control vulnerability that can write a file anywhere. A user can write a directory listing to /tmp, and can leak file data with a #include.

Frequently asked questions

What is CVE-2018-16367?: In OnlineJudge 2.0, the sandbox has an incorrect access control vulnerability that can write a file anywhere. A user can write a directory listing to /tmp, and can leak file data with a #include.
How severe is CVE-2018-16367?: CVE-2018-16367 has a CVSS 3.x base score of 9.9, rated critical 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-2018-16367 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16367?: CVE-2018-16367 affects Qduoj Onlinejudge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-16367?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-16367 published?: CVE-2018-16367 was published on 2018-09-02 and last updated on 2026-06-17.

References

https://github.com/QingdaoU/OnlineJudge/issues/165

Affected products (1)

cpe:2.3:a:qduoj:onlinejudge:2.0:*:*:*:*:*:*:*

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