CVE-2020-12690

An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. The list of roles provided for an OAuth1 access token is silently ignored. Thus, when an access token is used to request a keystone token, the keystone token contains every role assignment the creator had for the project. This results in the provided keystone token having more role assignments than the creator intended, possibly giving unintended escalated access.

Published: 2020-05-07 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-12690 is rated Moderate Risk (58.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.82%). 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-2020-12690

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 2025-03-30 2.59% 0.82% -1.77%
2 2025-03-29 0.82% 2.59% +1.77%
3 2025-03-17 — 0.82% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-12690

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
6.5 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 6.4 [email protected]

Weakness enumeration for CVE-2020-12690

GitHub Security Advisory for CVE-2020-12690

GHSA-6m8p-x4qw-gh5j · Severity: high · Ecosystem: pip — Insufficient Session Expiration in OpenStack Keystone

OS Trackers for CVE-2020-12690

vendor priority summary link
debian not yet assigned CVE-2020-12690 not yet assigned priority: Debian including 1 source packages (keystone), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-12690
redhat high — https://access.redhat.com/security/cve/CVE-2020-12690
suse medium — https://www.suse.com/security/cve/CVE-2020-12690/
ubuntu medium CVE-2020-12690 medium priority: Ubuntu including 1 source packages (keystone), 17 status rows across 17 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 12, released 2, DNE 1, ignored 1, needed 1. https://ubuntu.com/security/CVE-2020-12690

Affected software / configurations for CVE-2020-12690

Vendor Product Version Raw CPE
openstack keystone < 15.0.1 cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*
openstack keystone 16.0.0 cpe:2.3:a:openstack:keystone:16.0.0:*:*:*:*:*:*:*

References for CVE-2020-12690

cvelogic Threat Intelligence