How severe is CVE-2018-15798?

CVE-2018-15798 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2018-15798 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-2018-15798?

CVE-2018-15798 affects Pivotal Software Concourse. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-15798?

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-2018-15798 published?

CVE-2018-15798 was published on 2018-12-19 and last updated on 2026-06-17.

CVE-2018-15798

CVE-2018-15798 is a high-severity vulnerability in Pivotal Software Concourse with a CVSS 3.x base score of 7.6. 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-601.

Key facts

Severity: High (CVSS 3.x base score 7.6)
CVSS v2: 5.8
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Pivotal Software Concourse
Published: 2018-12-19
Last modified: 2026-06-17

Description

Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. A remote unauthenticated attacker could convince a user to click on a link using the oAuth redirect link with an untrusted website and gain access to that user's access token in Concourse.

Frequently asked questions

What is CVE-2018-15798?: Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. A remote unauthenticated attacker could convince a user to click on a link using the oAuth redirect link with an untrusted website and gain access to that user's access token in Concourse.
How severe is CVE-2018-15798?: CVE-2018-15798 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2018-15798 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-2018-15798?: CVE-2018-15798 affects Pivotal Software Concourse. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-15798?: 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-2018-15798 published?: CVE-2018-15798 was published on 2018-12-19 and last updated on 2026-06-17.

References

https://pivotal.io/security/cve-2018-15798

Affected products (1)

cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:*

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