CVE-2020-5415Concourse's GitLab auth allows impersonation
- 10.0CriticalCVSS base score
- 1.2%Exploitation in 30 daysEPSS · top 31% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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
ID reserved
By pivotal
- 7 months later
· 7 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| pivotalCNA (assigner) | 3.0 | Critical10.0 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L |
| NVDNVD · Modified | 3.1 | Critical10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 1.2% · top 31% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 10.0.
Affected products
- affected 6.4 – < 6.4.1
- affected 6.3 – < 6.3.1
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/concourse/concourseGHSA-627p-rr78-99rj (opens in a new tab)
- Gogithub.com/concourse/dexGHSA-627p-rr78-99rj (opens in a new tab)
References
References2
- https://github.com/concourse/concourse/security/advisories/GHSA-627p-rr78-99rj (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://tanzu.vmware.com/security/cve-2020-5415 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-2453 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-627p-rr78-99rj (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-5415)Record last updated .