Description
ZITADEL 3.0.0 through 3.4.15 and 4.0.0 before 4.17.3 creates links between user accounts and external identity providers without verifying a primary factor or the caller's permission, including on identify-only Login V2 sessions and via the User Service V2 AddIDPLink endpoint. An unauthenticated attacker knowing a victim's login name can bind their own external IdP identity to the victim's account and then sign in as the victim.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| zitadel | zitadel | 4.0.0 – < 4.17.3, 3.0.0 – ≤ 3.4.15 | 4.17.3 |
References
- GitHub Security Advisory (GHSA-g8gj-gq47-xgf4) vendor-advisory
- VulnCheck Advisory: ZITADEL before 4.17.3 Account Takeover via External IdP Linking third-party-advisory