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» CVE-2018-15798
Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. 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.
NVD Status： Modified ，CVE State: published
Threat Intelligence & Risk Assessment for CVE-2018-15798
Conclusion & alert: CVE-2018-15798 is rated Moderate Risk (52.8/100) : CVSS High severity, with medium exploitation likelihood (EPSS 1.15%).Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
Exploit prediction scoring system (EPSS) score for CVE-2018-15798
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
#
Date
Old EPSS score
New EPSS score
Delta (New - Old)
1
2026-06-15
0.56%
1.15%
+0.58%
2
2025-07-30
0.67%
0.56%
-0.10%
3
2025-03-30
—
0.67%
—
Full EPSS history
(9 records total)
Common vulnerability scoring system (CVSS) metrics for CVE-2018-15798
CVSS metrics for this CVE.
Base score
Version
Severity
Vector
Exploitability
Impact
Score source
7.6
3.0
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
2.8
4.7
[email protected]
5.4
3.0
MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
2.8
2.5
[email protected]
5.8
2.0
MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N
Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
8.6
4.9
[email protected]
Weakness enumeration for CVE-2018-15798
GitHub Security Advisory for CVE-2018-15798
GHSA-9689-rx4v-cqgc · Severity: medium · Ecosystem: go
— Pivotal Concourse Open Redirect in Login Flow
Affected software / configurations for CVE-2018-15798
Vendor
Product
Version
Raw CPE
pivotal_software
concourse
>= 4.0.0, < 4.2.2
cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:*
References for CVE-2018-15798
cvelogic
Threat Intelligence