CVE-2020-5409 json
Concourse Open Redirect in the /sky/login endpoint
published 2020-05-13 6 y ago modified 2026-09-10 59 d ago also BIT-concourse-2020-5409 , EUVD-2020-26583
- cvss
- 7.6
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
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.)
Patch / fix
- bitnami concourse 5.2.8, 5.5.10, 5.8.1
- Pivotal Concourse 5.2.8, 5.5.10, 5.8.1, 6.0.0
Exploit prediction
0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.6 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
| OSV | 3.0 | 7.6 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | concourse | <5.2.8 >=5.3.0, <5.5.10 >=5.6.0, <5.8.1 |
5.2.8 5.5.10 5.8.1 |
Affected products
- Pivotal Concourse
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
tanzu.vmware.com
/security/cve-2020-5409
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-5409
web
Sources
- CVE List CVE-2020-5409
- NVD CVE-2020-5409
- OSV BIT-concourse-2020-5409
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