CVE-2025-64103 Zitadel Bypass Second Authentication Factor
Attackers can bypass second-factor authentication in Zitadel if MFA is configured but not strictly enforced by policy, potentially compromising accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-64103?
CVE-2025-64103 is a high-severity authentication bypass vulnerability in zitadel, published on 29 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Starting from 2.53.6, 2.54.3, and 2.55.0, Zitadel only required multi factor authentication in case the login policy has either enabled requireMFA or requireMFAForLocalUsers. If a user has set up MFA without this requirement, Zitadel would consider single factor auhtenticated sessions as valid as well and not require multiple factors. Bypassing second authentication factors weakens multifactor authentication and enables attackers to bypass the more secure factor. An attacker can target the TOTP code alone, only six digits, bypassing password verification entirely and potentially compromising accounts with 2FA enabled. This vulnerability is fixed in 4.6.0, 3.4.3, and 2.71.18.
Which versions are affected by CVE-2025-64103?
9 open source packages ship an affected version, including github.com/zitadel/zitadel/v2 and github.com/zitadel/zitadel. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/zitadel/zitadel/v2 Go | From 2.53.6 to 2.53.9 | None |
github.com/zitadel/zitadel/v2 Go | From 2.53.6 to 2.53.9 | None |
github.com/zitadel/zitadel/v2 Go | From 2.54.3 to 2.54.10 | None |
github.com/zitadel/zitadel/v2 Go | From 2.54.3 to 2.54.10 | None |
github.com/zitadel/zitadel/v2 Go | From 2.55.0 | 2.71.18 |
github.com/zitadel/zitadel/v2 Go | From 2.55.0 | 2.71.18 |
3 more packages
github.com/zitadel/zitadel Go | All versions | None |
github.com/zitadel/zitadel Go | All versions | 1.80.0-v2.20.0.20251029091250-b284f8474eed |
github.com/zitadel/zitadel Go | All versions | 1.80.0-v2.20.0.20251029091250-b284f8474eed |
Products include Zitadel Zitadel.
How do I fix CVE-2025-64103?
Upgrade github.com/zitadel/zitadel/v2 to 2.71.18 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-64103 being exploited?
There is no known exploitation of CVE-2025-64103 in the wild and no public exploit code.
Other vulnerabilities in zitadel
- CVE-2026-29191 ZITADEL: 1-Click Account Takeover via XSS in /saml-post Endpoint
- CVE-2025-67494 ZITADEL Vulnerable to Unauthenticated Full-Read SSRF via V2 Login
- CVE-2025-27507 IDOR Vulnerabilities in ZITADEL's Admin API that Primarily Impact LDAP Configurations
- CVE-2025-31123 Zitadel Expired JWT Keys Usable for Authorization Grants
- CVE-2024-29891 ZITADEL Improper Content-Type Validation Leads to Account Takeover via Stored XSS + CSP Bypass
Sources
Also known as GHSA-cfjq-28r2-4jv5, GO-2025-4083.