{"cve":"CVE-2025-64103","nvd":{"published":"2025-10-29T19:15:39.067","modified":"2026-10-19T13:10:00.110","status":"Analyzed","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.","cvss_v4":{"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","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-287","CWE-308"],"references":["https://github.com/zitadel/zitadel/commit/b284f8474eed0cba531905101619e7ae7963156b","https://github.com/zitadel/zitadel/security/advisories/GHSA-cfjq-28r2-4jv5"],"products":["zitadel:zitadel"],"source":"nvd","synced_at":"2026-10-19T22:14:53.307938015+00:00"},"epss":{"cve":"CVE-2025-64103","score":0.00352,"percentile":0.28616,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-cfjq-28r2-4jv5","url":"https://osv.dev/vulnerability/GHSA-cfjq-28r2-4jv5","summary":"Zitadel May Bypass Second Authentication Factor","modified":"2025-11-05T22:14:13Z","packages":[{"ecosystem":"Go","name":"github.com/zitadel/zitadel/v2","purl":"pkg:golang/github.com/zitadel/zitadel/v2","ranges":[">=2.53.6 <=2.53.9"],"fixed":[]},{"ecosystem":"Go","name":"github.com/zitadel/zitadel/v2","purl":"pkg:golang/github.com/zitadel/zitadel/v2","ranges":[">=2.54.3 <=2.54.10"],"fixed":[]},{"ecosystem":"Go","name":"github.com/zitadel/zitadel/v2","purl":"pkg:golang/github.com/zitadel/zitadel/v2","ranges":[">=2.55.0 <2.71.18"],"fixed":["2.71.18"]},{"ecosystem":"Go","name":"github.com/zitadel/zitadel","purl":"pkg:golang/github.com/zitadel/zitadel","ranges":["<1.80.0-v2.20.0.20251029091250-b284f8474eed"],"fixed":["1.80.0-v2.20.0.20251029091250-b284f8474eed"]}]},{"id":"GO-2025-4083","url":"https://osv.dev/vulnerability/GO-2025-4083","summary":"Zitadel May Bypass Second Authentication Factor in github.com/zitadel/zitadel","modified":"2025-11-05T19:57:12.401521Z","packages":[{"ecosystem":"Go","name":"github.com/zitadel/zitadel","purl":"pkg:golang/github.com/zitadel/zitadel","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}