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Advisories

ZITADEL before 4.16.2 Account Pre-Hijacking via Forged External IdP Callback

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severity
critical
date
Affecting

  • zitadel >= 0, < 4.16.2

  • zitadel >= 0, < 3.4.14

CWE
  • CWE-290 Authentication Bypass by Spoofing
CVSS
9.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
Ibonok, livio-a, IAM-marco, AdamKorcz
Description
ZITADEL before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in the hosted Login V1 UI because the 'external account not found' registration endpoint trusts client-supplied external identity fields without a completed IdP callback. Unauthenticated attackers can submit forged IDPConfigID and ExternalUserID values to pre-create an account bound to a victim's external IdP identity, which the victim's later genuine external login then signs into.

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