How severe is CVE-2021-21679?

CVE-2021-21679 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-2021-21679 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21679?

CVE-2021-21679 affects Jenkins Azure Ad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21679?

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-2021-21679 published?

CVE-2021-21679 was published on 2021-08-31 and last updated on 2026-06-17.

CVE-2021-21679

CVE-2021-21679 is a high-severity vulnerability in Jenkins Azure Ad 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% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Jenkins Azure Ad
Published: 2021-08-31
Last modified: 2026-06-17

Description

Jenkins Azure AD Plugin 179.vf6841393099e and earlier allows attackers to craft URLs that would bypass the CSRF protection of any target URL in Jenkins.

Frequently asked questions

What is CVE-2021-21679?: Jenkins Azure AD Plugin 179.vf6841393099e and earlier allows attackers to craft URLs that would bypass the CSRF protection of any target URL in Jenkins.
How severe is CVE-2021-21679?: CVE-2021-21679 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-2021-21679 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21679?: CVE-2021-21679 affects Jenkins Azure Ad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21679?: 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-2021-21679 published?: CVE-2021-21679 was published on 2021-08-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:azure_ad:*:*:*:*:*:jenkins:*:*

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