Medium
Security advisory
Pivotal Concourse, most versions prior to 6.0.0, allows redirects to untrusted websites in its login flow. 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. (This issue is similar to, but distinct from, CVE-2018-15798.)
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-5409
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 06:48 UTC · Revision 1
Source evidence
Pivotal Concourse, most versions prior to 6.0.0, allows redirects to untrusted websites in its login flow. 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. (This issue is similar to, but distinct from, CVE-2018-15798.)
osv:CVE-2020-5409
Complete source record
{
"id": "3e9fbd9bf9012e7b8f361b87579960fb632049ce9bbf0d0a6ceae90441e3fad7",
"url": "https://osv.dev/vulnerability/CVE-2020-5409",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-5409",
"summary": "Pivotal Concourse, most versions prior to 6.0.0, allows redirects to untrusted websites in its login flow. 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. (This issue is similar to, but distinct from, CVE-2018-15798.)",
"evidence": "osv:CVE-2020-5409",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-5409",
"aliases": [
"BIT-concourse-2020-5409",
"CVE-2020-5409"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/concourse/concourse",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "3162bc170c4471aa900f6c413dad373203d7f0b8"
},
{
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{
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{
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{
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}
],
"database_specific": {
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{
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"range": [
{
"introduced": "0"
},
{
"fixed": "5.2.8"
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],
"source": "CPE_RANGE"
},
{
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-5409.json"
}
}
],
"modified": "2026-10-24T10:30:44.620920088Z",
"provider": "osv",
"references": [
"https://tanzu.vmware.com/security/cve-2020-5409"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2020-5409",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 435939,
"published_at": "2020-05-14T00:15:11.603+00:00"
}