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CVE-2020-5409

Concourse Open Redirect in the /sky/login endpoint

MEDIUM
6.1
CVSS Score
Published: May 13, 2020 at 11:15 PM UTC
Updated: June 17, 2026 at 03:21 AM UTC
1 product affected across 1 vendorConcourse

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.9%

Description

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.)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Concourse· Pivotal
95%
v < 5.2.8v < 5.5.10v < 5.8.1v < 6.0.05.3.0 ≤ v < 5.5.105.6.0 ≤ v < 5.8.1
Affected range stops below 5.2.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.5.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.8.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://tanzu.vmware.com/security/cve-2020-5409

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-601

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