CVE-2020-27826

mediumPriorität · verfolgen · 17EPSS 0.006 · 47. PerzentilEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.57% (47th) EPSS
CVSS 4.9 · medium
Is it mine?
15 products
Prüfe deine Angriffsfläche
Who says so?
5 sources
cnnvd · enisa_euvd · nvd · osv

EPSS · bewertet 2026-10-27

A flaw was found in Keycloak before version 12.0.0 where it is possible to update the user's metadata attributes using Account REST API. This flaw allows an attacker to change its own NameID attribute to impersonate the admin user for any particular application.

01

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

  • Behobenrh-sso7-keycloak-0:9.0.10-1.redhat_00001.1.el6sso.noarch as a component of Red Hat Single Sign-On 7.4 for RHEL 6 Serverredhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2020:5526
  • Behobenrh-sso7-keycloak-0:9.0.10-1.redhat_00001.1.el6sso.src as a component of Red Hat Single Sign-On 7.4 for RHEL 6 Serverredhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2020:5526
  • Behobenrh-sso7-keycloak-server-0:9.0.10-1.redhat_00001.1.el6sso.noarch as a component of Red Hat Single Sign-On 7.4 for RHEL 6 Serverredhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2020:5526
  • Behobenrh-sso7-keycloak-0:9.0.10-1.redhat_00001.1.el7sso.noarch as a component of Red Hat Single Sign-On 7.4 for RHEL 7 Serverredhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2020:5527
  • Behobenrh-sso7-keycloak-0:9.0.10-1.redhat_00001.1.el7sso.src as a component of Red Hat Single Sign-On 7.4 for RHEL 7 Serverredhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2020:5527
  • Behobenrh-sso7-keycloak-server-0:9.0.10-1.redhat_00001.1.el7sso.noarch as a component of Red Hat Single Sign-On 7.4 for RHEL 7 Serverredhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2020:5527
  • Behobenrh-sso7-keycloak-0:9.0.10-1.redhat_00001.1.el8sso.noarch as a component of Red Hat Single Sign-On 7.4 for RHEL 8redhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2020:5528
  • Behobenrh-sso7-keycloak-0:9.0.10-1.redhat_00001.1.el8sso.src as a component of Red Hat Single Sign-On 7.4 for RHEL 8redhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2020:5528
  • Behobenrh-sso7-keycloak-server-0:9.0.10-1.redhat_00001.1.el8sso.noarch as a component of Red Hat Single Sign-On 7.4 for RHEL 8redhat_csaf

    Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2020:5528
02

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

8.8
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · low–high · 3.9–8.8

v2.04.9mediumAV:N/AC:M/Au:S/C:P/I:P/A:Nprimary · NVD / NIST USAusnutzbarkeit 6.8 · Auswirkung 4.9
v3.14.2mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:Nprimary · NVD / NIST USAusnutzbarkeit 1.6 · Auswirkung 2.5
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV
v3.13.9lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)
v3.14.2mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:Nsecondary · Red Hat Product Security US
03

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-250USCWE-250USCWE-250US
04

betroffene Produkte (15)

Betroffene Produkte und Versionsbereiche.

05

Advisories (4)

Hersteller- und Ökosystem-Meldungen dazu.

  • RHSA-2020:5526Red Hat Security Advisory: Red Hat Single Sign-On 7.4.4 security update on RHEL 62020-12-15csaf · redhat_csafUS

    New Red Hat Single Sign-On 7.4.4 packages are now available for Red Hat Enterprise Linux 6.

  • RHSA-2020:5527Red Hat Security Advisory: Red Hat Single Sign-On 7.4.4 security update on RHEL 72020-12-15csaf · redhat_csafUS

    New Red Hat Single Sign-On 7.4.4 packages are now available for Red Hat Enterprise Linux 7.

  • RHSA-2020:5528Red Hat Security Advisory: Red Hat Single Sign-On 7.4.4 security update on RHEL 82020-12-15csaf · redhat_csafUS

    New Red Hat Single Sign-On 7.4.4 packages are now available for Red Hat Enterprise Linux 8.

  • GHSA-m9cj-v55f-8x26Authentication Bypass in keycloak2022-03-18ghsa · osvUS

    A flaw was found in Keycloak before version 12.0.0 where it is possible to update the user's metadata attributes using Account REST API. This flaw allows an attacker to change its own NameID attribute to impersonate the admin user for any particular application.

06

auch bekannt als (3)

Weitere Namen und Kennungen dieser Entität.

07

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvdenisa_euvdnvdosvredhat_csafNVDCVE.orgMITRE
veröffentlicht 2021-05-28geändert 2026-06-17
08

Referenzen (8)

Externe Belege — Patches, Meldungen, Analysen.

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