How severe is CVE-2021-21627?

CVE-2021-21627 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-21627 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21627?

CVE-2021-21627 affects Jenkins Libvirt Agents. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21627?

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

When was CVE-2021-21627 published?

CVE-2021-21627 was published on 2021-03-18 and last updated on 2026-06-17.

CVE-2021-21627

CVE-2021-21627 is a high-severity vulnerability in Jenkins Libvirt Agents with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Jenkins Libvirt Agents
Published: 2021-03-18
Last modified: 2026-06-17

Description

A cross-site request forgery (CSRF) vulnerability in Jenkins Libvirt Agents Plugin 1.9.0 and earlier allows attackers to stop hypervisor domains.

Frequently asked questions

What is CVE-2021-21627?: A cross-site request forgery (CSRF) vulnerability in Jenkins Libvirt Agents Plugin 1.9.0 and earlier allows attackers to stop hypervisor domains.
How severe is CVE-2021-21627?: CVE-2021-21627 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-21627 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21627?: CVE-2021-21627 affects Jenkins Libvirt Agents. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21627?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-21627 published?: CVE-2021-21627 was published on 2021-03-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:libvirt_agents:*:*:*:*:*:jenkins:*:*

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