Vulnerability · Published Oct 29, 2025 · Assigned by GitHub_M
CVE-2025-64103Zitadel Bypass Second Authentication Factor
High 8.7
In plain English
A high-severity improper authentication in zitadel from zitadel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/zitadel/zitadel | 1.80.0-v2.20.0.20251029091250-b284f8474eed | GHSA-cfjq-28r2-4jv5 |
| Go | github.com/zitadel/zitadel | no fix listed | GO-2025-4083 |
| Go | github.com/zitadel/zitadel/v2 | no fix listed | GHSA-cfjq-28r2-4jv5 |
| Go | github.com/zitadel/zitadel/v2 | no fix listed | GHSA-cfjq-28r2-4jv5 |
| Go | github.com/zitadel/zitadel/v2 | 2.71.18 | GHSA-cfjq-28r2-4jv5 |
Affected products (as reported)
Weakness: CWE-308, CWE-287 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N