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Fencer Vulns
medium 6.8

CVE-2021-20262 json

Keycloak Missing authentication for critical function

published 2021-03-09 5 y ago modified 2026-06-17 4 mo ago also GHSA-xf46-8vvp-4hxx , EUVD-2021-0724

cvss
6.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

A flaw was found in Keycloak 12.0.0 where re-authentication does not occur while updating the password. This flaw allows an attacker to take over an account if they can obtain temporary, physical access to a user’s browser. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Patch / fix

  • keycloak Arch Linux 16.0.0-1

arch linux advisories AVG-1332

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-20262 updated cvss 6.8

keycloak: missing re-authentication while updating password

  • Red Hat Single Sign-On 7 rh-sso7-keycloak rh-sso7-keycloak
    affected: no fix available
  • Red Hat Decision Manager 7 keycloak keycloak Red Hat Fuse 7 keycloak keycloak Red Hat Integration Camel K 1 keycloak keycloak Red Hat OpenShift Application Runtimes keycloak keycloak Red Hat Process Automation 7 keycloak keycloak Red Hat support for Spring Boot keycloak keycloak
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.8 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 6.8 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-core
<=12.0.4
 no fix listed

Affected products

  • n/a keycloak

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.