How severe is CVE-2021-21664?

CVE-2021-21664 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-21664 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21664?

CVE-2021-21664 affects Jenkins Xebialabs Xl Deploy. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21664?

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

When was CVE-2021-21664 published?

CVE-2021-21664 was published on 2021-06-10 and last updated on 2026-06-17.

CVE-2021-21664

CVE-2021-21664 is a medium-severity vulnerability in Jenkins Xebialabs Xl Deploy 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Jenkins Xebialabs Xl Deploy
Published: 2021-06-10
Last modified: 2026-06-17

Description

An incorrect permission check in Jenkins XebiaLabs XL Deploy Plugin 10.0.1 and earlier allows attackers with Generic Create permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing Username/password credentials stored in Jenkins.

Frequently asked questions

What is CVE-2021-21664?: An incorrect permission check in Jenkins XebiaLabs XL Deploy Plugin 10.0.1 and earlier allows attackers with Generic Create permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing Username/password credentials stored in Jenkins.
How severe is CVE-2021-21664?: CVE-2021-21664 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-21664 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21664?: CVE-2021-21664 affects Jenkins Xebialabs Xl Deploy. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21664?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21664 published?: CVE-2021-21664 was published on 2021-06-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:xebialabs_xl_deploy:*:*:*:*:*:jenkins:*:*

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