CVE-2021-20222

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-23 · updated 2026-06-17
Weakness: CWE-20

Description

A flaw was found in keycloak. The new account console in keycloak can allow malicious code to be executed using the referrer URL. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Affected products

Keycloak: from 9.0.0 before 13.0.0 — fixed in 13.0.0

How to fix

Upgrade to a fixed version: Keycloak 13.0.0. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1924606
https://bugzilla.redhat.com/show_bug.cgi?id=1924606

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