Concourse Open Redirect in the /sky/login endpoint
Priority LOW 29CWE-601Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-601.
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.)
Why it matters now
EPSS 0.00907 60th percentileScored 2026-11-07
Fix Fixed Concourse (Pivotal): 5.2.8, 5.5.10, 5.8.1 +1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Pivotal | Concourse | before 5.2.8; before 5.5.10; before 5.8.1; before 6.0.0 | 5.2.8, 5.5.10, 5.8.1, 6.0.0 | Patch available | CNA |
- Concourse VendorPivotal Affected before 5.2.8; before 5.5.10; before 5.8.1; before 6.0.0 Fixed in 5.2.8, 5.5.10, 5.8.1, 6.0.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:* | before 5.2.8; 5.3.0 to before 5.5.10; 5.6.0 to before 5.8.1 | Vulnerable | Spring by Pivotal |
- cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:* Versions before 5.2.8; 5.3.0 to before 5.5.10; 5.6.0 to before 5.8.1 Vulnerable ·Spring by Pivotal
Remediation
- Fix · CNA Concourse (Pivotal) Fixed in 5.2.8, 5.5.10, 5.8.1, 6.0.0
Timeline
- 2026-10-02 Threatist record created from CVE-2020-5409
References
More Pivotal vulnerabilities
- TI-2017-05637 Improper input validation in Pivotal Spring Data REST and Spring Boot CVSS 3.0CRITICAL 9.8
- TI-2016-04299 When processing authorization requests using the whitelabel views in Spring Security… CVSS 3.0HIGH 8.8
- TI-2018-01165 Code injection in Pivotal Spring Security OAuth CVSS 3.0CRITICAL 9.8
- TI-2018-11237 DoS Attack via Range Requests CVSS 3.1HIGH 7.5
- TI-2019-02791 Apps Manager unverified SSL certs in Cloud Controller proxy CVSS 3.0CRITICAL 9.8
- TI-2018-11239 On Demand Services SDK Timing Attack Vulnerability CVSS 3.0CRITICAL 9.8
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences