How severe is CVE-2021-21698?

CVE-2021-21698 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-21698 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21698?

CVE-2021-21698 affects Jenkins Subversion. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21698?

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-2021-21698 published?

CVE-2021-21698 was published on 2021-11-04 and last updated on 2026-06-17.

CVE-2021-21698

CVE-2021-21698 is a high-severity vulnerability in Jenkins Subversion with a CVSS 3.x base score of 7.5. 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Jenkins Subversion
Published: 2021-11-04
Last modified: 2026-06-17

Description

Jenkins Subversion Plugin 2.15.0 and earlier does not restrict the name of a file when looking up a subversion key file on the controller from an agent.

Frequently asked questions

What is CVE-2021-21698?: Jenkins Subversion Plugin 2.15.0 and earlier does not restrict the name of a file when looking up a subversion key file on the controller from an agent.
How severe is CVE-2021-21698?: CVE-2021-21698 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-21698 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21698?: CVE-2021-21698 affects Jenkins Subversion. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21698?: 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-2021-21698 published?: CVE-2021-21698 was published on 2021-11-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:subversion:*:*:*:*:*:jenkins:*:*

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