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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| zitadel | zitadel | 3.0.0 – < 4.18.0 | 4.18.0 |
References
- GitHub Security Advisory (GHSA-4hgj-wm6c-q7p2) vendor-advisory
- VulnCheck Advisory: ZITADEL 3.0.0 before 4.18.0 Unauthenticated Username Change via Login V1 third-party-advisory