How severe is CVE-2020-5631?

CVE-2020-5631 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-2020-5631 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5631?

CVE-2020-5631 affects Cmonos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5631?

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

When was CVE-2020-5631 published?

CVE-2020-5631 was published on 2020-10-06 and last updated on 2026-06-17.

CVE-2020-5631

CVE-2020-5631 is a medium-severity vulnerability in Cmonos 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% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Cmonos
Published: 2020-10-06
Last modified: 2026-06-17

Description

Stored cross-site scripting vulnerability in CMONOS.JP ver2.0.20191009 and earlier allows remote attackers to inject arbitrary script via unspecified vectors.

Frequently asked questions

What is CVE-2020-5631?: Stored cross-site scripting vulnerability in CMONOS.JP ver2.0.20191009 and earlier allows remote attackers to inject arbitrary script via unspecified vectors.
How severe is CVE-2020-5631?: CVE-2020-5631 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-2020-5631 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5631?: CVE-2020-5631 affects Cmonos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5631?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-5631 published?: CVE-2020-5631 was published on 2020-10-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cmonos:cmonos:2.0.20200916:*:*:*:*:*:*:*

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