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Advisories

ZITADEL 3.0.0 before 4.18.0 Unauthenticated Username Change via Login V1

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severity
high
date
Affecting

  • zitadel >= 3.0.0, < 4.18.0

CWE
  • CWE-306 Missing Authentication for Critical Function
CVSS
8.8
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Credit
muhlemmer, grvijayan, IAM-marco, AdamKorcz
Description
ZITADEL 3.0.0 before 4.18.0 contains a missing authentication vulnerability in the hosted Login V1 UI, where the change-username handler acts on the account bound to a login flow before any factor is verified. Unauthenticated attackers can submit a victim's login name and then post a new username to rename any active human user, including administrators, locking them out.

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