CVE-2021-3754: Keycloak user may register themselves with same email ID of any existing user

August 27, 2022 (updated September 16, 2022)

A flaw was found in keycloak where an attacker is able to register himself with the username same as the email ID of any existing user. This may cause trouble in getting password recovery email in case the user forgets the password.

References

access.redhat.com/security/cve/CVE-2021-3754
bugzilla.redhat.com/show_bug.cgi?id=1999196
github.com/advisories/GHSA-j9xq-j329-2xvg
nvd.nist.gov/vuln/detail/CVE-2021-3754

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