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No exploitation reportedFix available

CVE-2020-5415

No exploitation reported by the sources we read.

  • Published2020-08-12
  • Fixed in6.4.1 · 6.3.1 · 1.6.1-0.20200730151558-b00d1c8d8576 · 0.0.0-20200730151558-b00d1c8d8576 · 0.0.0-20200730150203-821b48abfd88
  • WeaknessCWE-290

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2020-08-1217:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-5415?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-5415?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Pivotal software concourse
BranchAffectedFixed in
6.4≥ 6.4.0, < 6.4.16.4.1
6.3< 6.3.16.3.1
6.3≥ 1.6.1, < 6.3.16.3.1
6.3≥ 0.0.0, < 6.3.16.3.1
1.6≥ 0.0.0, < 1.6.1-0.20200730151558-b00d1c8d85761.6.1-0.20200730151558-b00d1c8d8576
0.0< 0.0.0-20200730151558-b00d1c8d85760.0.0-20200730151558-b00d1c8d8576
0.0< 0.0.0-20200730150203-821b48abfd880.0.0-20200730150203-821b48abfd88

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Pivotal software concourse to 6.4.1 · 6.3.1 · 1.6.1-0.20200730151558-b00d1c8d8576 · 0.0.0-20200730151558-b00d1c8d8576 · 0.0.0-20200730150203-821b48abfd88

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.110read 2026-10-23
  • CNACVSS 3.010read 2026-10-23
  • NVDCVSS 2.06.4read 2026-10-23
  • CNAweakness (CWE)CWE-290read 2026-10-23
  • NVDweakness (CWE)CWE-290read 2026-10-23
  • FIRST EPSSEPSS score1.2 %2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Published
2020-08-12
Last Modified
2026-06-17
NVD status
Modified

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.

Is CVE-2020-5415 actively exploited?

Active exploitation of CVE-2020-5415 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-5415?

CVE-2020-5415 has a CVSS v3 base score of 10 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.

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