How severe is CVE-2021-21654?

CVE-2021-21654 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-21654 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21654?

CVE-2021-21654 affects Jenkins P4. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21654?

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

When was CVE-2021-21654 published?

CVE-2021-21654 was published on 2021-05-11 and last updated on 2026-06-17.

CVE-2021-21654

CVE-2021-21654 is a medium-severity vulnerability in Jenkins P4 with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jenkins P4
Published: 2021-05-11
Last modified: 2026-06-17

Description

Jenkins P4 Plugin 1.11.4 and earlier does not perform permission checks in multiple HTTP endpoints, allowing attackers with Overall/Read permission to connect to an attacker-specified Perforce server using attacker-specified username and password.

Frequently asked questions

What is CVE-2021-21654?: Jenkins P4 Plugin 1.11.4 and earlier does not perform permission checks in multiple HTTP endpoints, allowing attackers with Overall/Read permission to connect to an attacker-specified Perforce server using attacker-specified username and password.
How severe is CVE-2021-21654?: CVE-2021-21654 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-21654 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21654?: CVE-2021-21654 affects Jenkins P4. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21654?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21654 published?: CVE-2021-21654 was published on 2021-05-11 and last updated on 2026-06-17.

References

https://www.jenkins.io/security/advisory/2021-05-11/#SECURITY-2327

Affected products (1)

cpe:2.3:a:jenkins:p4:*:*:*:*:*:jenkins:*:*

More vulnerabilities in Jenkins P4

CVE-2021-21655 — High (CVSS 7.1): A cross-site request forgery (CSRF) vulnerability in Jenkins P4 Plugin 1.11.4 and earlier allows attackers to connect…
CVE-2020-2142 — Medium (CVSS 4.3): A missing permission check in Jenkins P4 Plugin 1.10.10 and earlier allows attackers with Overall/Read permission to…
CVE-2020-2141 — Medium (CVSS 4.3): A cross-site request forgery vulnerability in Jenkins P4 Plugin 1.10.10 and earlier allows attackers to trigger builds…

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