How severe is CVE-2020-5415?

CVE-2020-5415 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-5415 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5415?

CVE-2020-5415 affects Pivotal Software Concourse. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5415?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-5415 published?

CVE-2020-5415 was published on 2020-08-12 and last updated on 2026-06-17.

CVE-2020-5415

CVE-2020-5415 is a critical-severity vulnerability in Pivotal Software Concourse with a CVSS 3.x base score of 10.0. 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-290.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
CVSS v2: 6.4
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-290
Affected product: Pivotal Software Concourse
Published: 2020-08-12
Last modified: 2026-06-17

Description

Concourse, versions prior to 6.3.1 and 6.4.1, in installations which use the GitLab auth connector, is vulnerable to identity spoofing by way of configuring a GitLab account with the same full name as another user who is granted access to a Concourse team. GitLab groups do not have this vulnerability, so GitLab users may be moved into groups which are then configured in the Concourse team.

Frequently asked questions

What is CVE-2020-5415?: Concourse, versions prior to 6.3.1 and 6.4.1, in installations which use the GitLab auth connector, is vulnerable to identity spoofing by way of configuring a GitLab account with the same full name as another user who is granted access to a Concourse team. GitLab groups do not have this vulnerability, so GitLab users may be moved into groups which are then configured in the Concourse team.
How severe is CVE-2020-5415?: CVE-2020-5415 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-5415 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5415?: CVE-2020-5415 affects Pivotal Software Concourse. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5415?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-5415 published?: CVE-2020-5415 was published on 2020-08-12 and last updated on 2026-06-17.

References

Affected products (1)

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

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