How severe is CVE-2018-1000188?

CVE-2018-1000188 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-1000188 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000188?

CVE-2018-1000188 affects Jenkins Cas. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1000188?

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

When was CVE-2018-1000188 published?

CVE-2018-1000188 was published on 2018-06-05 and last updated on 2026-06-17.

CVE-2018-1000188

CVE-2018-1000188 is a medium-severity vulnerability in Jenkins Cas with a CVSS 3.x base score of 5.4. 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-918.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 5.5
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Jenkins Cas
Published: 2018-06-05
Last modified: 2026-06-17

Description

A server-side request forgery vulnerability exists in Jenkins CAS Plugin 1.4.1 and older in CasSecurityRealm.java that allows attackers with Overall/Read access to cause Jenkins to send a GET request to a specified URL.

Frequently asked questions

What is CVE-2018-1000188?: A server-side request forgery vulnerability exists in Jenkins CAS Plugin 1.4.1 and older in CasSecurityRealm.java that allows attackers with Overall/Read access to cause Jenkins to send a GET request to a specified URL.
How severe is CVE-2018-1000188?: CVE-2018-1000188 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-1000188 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000188?: CVE-2018-1000188 affects Jenkins Cas. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1000188?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-1000188 published?: CVE-2018-1000188 was published on 2018-06-05 and last updated on 2026-06-17.

References

https://jenkins.io/security/advisory/2018-06-04/#SECURITY-809

Affected products (1)

cpe:2.3:a:jenkins:cas:*:*:*:*:*:jenkins:*:*

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