CVE-2025-64103

Zitadel Bypass Second Authentication Factor

High8.7EPSS 0.35%

Published: 29 Oct 2025
Updated: 30 Oct 2025
Reserved: 27 Oct 2025
Assigned by: GitHub_M

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.

Scores

CVSS scores of CVE-2025-64103, by who scored it
Scored by	CVSS	Score	Vector
GitHub_MCNA (assigner)	4.0	High8.7	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
NVDNVD · Analyzed	4.0	High8.7	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.35% · top 71% of all CVEs (6 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: yes · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.

Weakness

Affected products

zitadel · zitadel
- affected >= 4.0.0-rc.1, < 4.6.0
- affected >= 3.0.0-rc.1, < 3.4.3
- affected >= 2.55.0, < 2.71.18
- affected >= 2.54.3, <= 2.54.10
- affected >= 2.53.6, <= 2.53.9

Affected packages

From reviewed advisories of the GitHub Advisory Database.

Gogithub.com/zitadel/zitadelGHSA-cfjq-28r2-4jv5 (opens in a new tab)
Gogithub.com/zitadel/zitadel/v2GHSA-cfjq-28r2-4jv5 (opens in a new tab)

References (2)

https://github.com/zitadel/zitadel/security/advisories/GHSA-cfjq-28r2-4jv5 (opens in a new tab)x_refsource_CONFIRM
https://github.com/zitadel/zitadel/commit/b284f8474eed0cba531905101619e7ae7963156b (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated 30 Oct 2025, 14:51 UTC.