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CVE-2018-15798

19
FAUCET Score

CVE-2018-15798 affects Pivotal Concourse Release versions 4.x prior to 4.2.2, involving an open redirect vulnerability in its login flow. An unauthenticated attacker could trick a user into clicking a malicious OAuth redirect link, potentially exposing the user's Concourse access token. This vulnerability has a CVSS score of 5.4 (Medium) due to its low attack complexity and potential for partial confidentiality and integrity impact, requiring user interaction. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.0.0, < 4.2.2CPE matchmatch criteria
cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.6HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
4.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.15%
Probability of exploitation in next 30 days
EPSS Percentile
63.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0115 is in the 76th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

gopatch availablevia ghsa
Product: github.com/concourse/concourseFixed in: 5.2.8
gopatch availablevia ghsa
Product: github.com/concourse/concourseFixed in: 5.5.10
gopatch availablevia ghsa
Product: github.com/concourse/concourseFixed in: 5.8.1

Vendor Advisories (1)

goGHSA-9689-rx4v-cqgcmedium

Pivotal Concourse Open Redirect in Login Flow

Feb 15, 2022

References

pivotal.io / security/cve-2018-15798
Release NotesVendor Advisory