How severe is CVE-2021-39427?

CVE-2021-39427 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-39427 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39427?

CVE-2021-39427 affects Vtimecn 188jianzhan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39427?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-39427 published?

CVE-2021-39427 was published on 2022-12-15 and last updated on 2026-06-17.

CVE-2021-39427

CVE-2021-39427 is a medium-severity vulnerability in Vtimecn 188jianzhan with a CVSS 3.x base score of 5.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Vtimecn 188jianzhan
Published: 2022-12-15
Last modified: 2026-06-17

Description

Cross site scripting vulnerability in 188Jianzhan 2.10 allows attackers to execute arbitrary code via the username parameter to /admin/reg.php.

Frequently asked questions

What is CVE-2021-39427?: Cross site scripting vulnerability in 188Jianzhan 2.10 allows attackers to execute arbitrary code via the username parameter to /admin/reg.php.
How severe is CVE-2021-39427?: CVE-2021-39427 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-39427 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39427?: CVE-2021-39427 affects Vtimecn 188jianzhan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39427?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-39427 published?: CVE-2021-39427 was published on 2022-12-15 and last updated on 2026-06-17.

References

https://github.com/vtime-tech/188Jianzhan/issues/4

Affected products (1)

cpe:2.3:a:vtimecn:188jianzhan:2.10:*:*:*:*:*:*:*

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