How severe is CVE-2019-1003021?

CVE-2019-1003021 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2019-1003021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-1003021?

CVE-2019-1003021 affects Jenkins Openid Connect Authentication. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-1003021?

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

When was CVE-2019-1003021 published?

CVE-2019-1003021 was published on 2019-02-06 and last updated on 2026-06-17.

CVE-2019-1003021

CVE-2019-1003021 is a medium-severity vulnerability in Jenkins Openid Connect Authentication 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. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Jenkins Openid Connect Authentication
Published: 2019-02-06
Last modified: 2026-06-17

Description

An exposure of sensitive information vulnerability exists in Jenkins OpenId Connect Authentication Plugin 1.4 and earlier in OicSecurityRealm/config.jelly that allows attackers able to view a Jenkins administrator's web browser output, or control the browser (e.g. malicious extension) to retrieve the configured client secret.

Frequently asked questions

What is CVE-2019-1003021?: An exposure of sensitive information vulnerability exists in Jenkins OpenId Connect Authentication Plugin 1.4 and earlier in OicSecurityRealm/config.jelly that allows attackers able to view a Jenkins administrator's web browser output, or control the browser (e.g. malicious extension) to retrieve the configured client secret.
How severe is CVE-2019-1003021?: CVE-2019-1003021 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2019-1003021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-1003021?: CVE-2019-1003021 affects Jenkins Openid Connect Authentication. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-1003021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-1003021 published?: CVE-2019-1003021 was published on 2019-02-06 and last updated on 2026-06-17.

References

https://jenkins.io/security/advisory/2019-01-28/#SECURITY-886

Affected products (1)

cpe:2.3:a:jenkins:openid_connect_authentication:*:*:*:*:*:jenkins:*:*

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