Critical
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-5415
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:29 UTC · Revision 1
Source evidence
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.
osv:CVE-2020-5415
Complete source record
{
"id": "1e48a4e4bd8ae193af9735c0fa870cdd89a88467f538a9366516f05d6d113260",
"url": "https://osv.dev/vulnerability/CVE-2020-5415",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-5415",
"summary": "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.",
"evidence": "osv:CVE-2020-5415",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2020-5415",
"aliases": [
"BIT-concourse-2020-5415",
"CVE-2020-5415",
"GHSA-627p-rr78-99rj"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/concourse/concourse",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "427db2dc7141dd1909125d33c121c789831c49f0"
},
{
"introduced": "0db34b4844310c2c2a85ff32d7d22011066798fb"
},
{
"fixed": "01d9f3324ecde63d7f648122620bc17e45323f9a"
}
],
"database_specific": {
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{
"cpe": "cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "6.3.1"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:*",
"range": [
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{
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-5415.json"
}
}
],
"modified": "2026-10-20T10:54:22.874710847Z",
"provider": "osv",
"references": [
"https://tanzu.vmware.com/security/cve-2020-5415",
"https://github.com/concourse/concourse/security/advisories/GHSA-627p-rr78-99rj"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2020-5415",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 385252,
"published_at": "2020-08-12T17:15:12.633+00:00"
}