How severe is CVE-2020-3939?

CVE-2020-3939 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-3939 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3939?

CVE-2020-3939 affects Sysjust Syuan-gu-da-shin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-3939?

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

When was CVE-2020-3939 published?

CVE-2020-3939 was published on 2020-02-04 and last updated on 2026-06-17.

CVE-2020-3939

CVE-2020-3939 is a medium-severity vulnerability in Sysjust Syuan-gu-da-shin with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Sysjust Syuan-gu-da-shin
Published: 2020-02-04
Last modified: 2026-06-17

Description

SysJust Syuan-Gu-Da-Shih, versions before 20191223, contain vulnerability of Cross-Site Scripting(XSS), personal information may be leaked to attackers via the vulnerability.

Frequently asked questions

What is CVE-2020-3939?: SysJust Syuan-Gu-Da-Shih, versions before 20191223, contain vulnerability of Cross-Site Scripting(XSS), personal information may be leaked to attackers via the vulnerability.
How severe is CVE-2020-3939?: CVE-2020-3939 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-3939 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3939?: CVE-2020-3939 affects Sysjust Syuan-gu-da-shin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-3939?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-3939 published?: CVE-2020-3939 was published on 2020-02-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sysjust:syuan-gu-da-shin:*:*:*:*:*:*:*:*

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