How severe is CVE-2021-31604?

CVE-2021-31604 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-31604 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31604?

CVE-2021-31604 affects Openvpn-monitor Project Openvpn-monitor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31604?

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

When was CVE-2021-31604 published?

CVE-2021-31604 was published on 2021-09-27 and last updated on 2026-06-17.

CVE-2021-31604

CVE-2021-31604 is a medium-severity vulnerability in Openvpn-monitor Project Openvpn-monitor with a CVSS 3.x base score of 6.5. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Openvpn-monitor Project Openvpn-monitor
Published: 2021-09-27
Last modified: 2026-06-17

Description

furlongm openvpn-monitor through 1.1.3 allows CSRF to disconnect an arbitrary client.

Frequently asked questions

What is CVE-2021-31604?: furlongm openvpn-monitor through 1.1.3 allows CSRF to disconnect an arbitrary client.
How severe is CVE-2021-31604?: CVE-2021-31604 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-31604 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31604?: CVE-2021-31604 affects Openvpn-monitor Project Openvpn-monitor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31604?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31604 published?: CVE-2021-31604 was published on 2021-09-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openvpn-monitor_project:openvpn-monitor:*:*:*:*:*:*:*:*

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