Read the docs
TI-2025-22385 Aliases CVE-2025-31124

Zitadel allows User Enumeration by loginname attribute normalization

Priority LOW 31CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

Zitadel is open-source identity infrastructure software. ZITADEL administrators can enable a setting called "Ignoring unknown usernames" which helps mitigate attacks that try to guess/enumerate usernames. If enabled, ZITADEL will show the password prompt even if the user doesn't exist and report "Username or Password invalid". While the setting was correctly respected during the login flow, the user's username was normalized leading to a disclosure of the user's existence. This vulnerability is fixed in 2.71.6, 2.70.8, 2.69.9, 2.68.9, 2.67.13, 2.66.16, 2.65.7, 2.64.6, and 2.63.9.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00527 44th percentileScored 2026-11-07
Fix Fixed zitadel (zitadel): 2.63.9, 2.64.6, 2.65.7 +6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
zitadelzitadel2.62.0 to before 2.63.9; 2.64.0-rc.1 to before 2.64.6; 2.65.0-rc.1 to before 2.65.7; 2.66.0-rc.1 to before 2.66.16; 2.67.0-rc.1 to before 2.67.13; 2.68.0-rc.1 to before 2.68.9; 2.69.0-rc.1 to before 2.69.9; 2.70.0-rc.1 to before 2.70.8; 2.71.0-rc.1 to before 2.71.62.63.9, 2.64.6, 2.65.7, 2.66.16, 2.67.13, 2.68.9, 2.69.9, 2.70.8, 2.71.6Patch availableCNA
  • zitadel Vendorzitadel Affected 2.62.0 to before 2.63.9; 2.64.0-rc.1 to before 2.64.6; 2.65.0-rc.1 to before 2.65.7; 2.66.0-rc.1 to before 2.66.16; 2.67.0-rc.1 to before 2.67.13; 2.68.0-rc.1 to before 2.68.9; 2.69.0-rc.1 to before 2.69.9; 2.70.0-rc.1 to before 2.70.8; 2.71.0-rc.1 to before 2.71.6 Fixed in 2.63.9, 2.64.6, 2.65.7, 2.66.16, 2.67.13, 2.68.9, 2.69.9, 2.70.8, 2.71.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*before 2.63.9; 2.64.0 to before 2.64.6; 2.65.0 to before 2.65.7; 2.66.0 to before 2.66.16; 2.67.0 to before 2.67.13; 2.68.0 to before 2.68.9; 2.69.0 to before 2.69.9; 2.70.0 to before 2.70.8; 2.71.0 to before 2.71.6Vulnerablezitadel
  • cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* Versions before 2.63.9; 2.64.0 to before 2.64.6; 2.65.0 to before 2.65.7; 2.66.0 to before 2.66.16; 2.67.0 to before 2.67.13; 2.68.0 to before 2.68.9; 2.69.0 to before 2.69.9; 2.70.0 to before 2.70.8; 2.71.0 to before 2.71.6 Vulnerable ·zitadel

Remediation

  • Fix · CNA zitadel (zitadel) Fixed in 2.63.9, 2.64.6, 2.65.7, 2.66.16, 2.67.13, 2.68.9, 2.69.9, 2.70.8, 2.71.6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-31124

References

Patch 1

Advisory 1

Other 9

  • TI-2024-26607 ZITADEL Vulnerable to Session Information Leakage CVSS 3.1MEDIUM 6.5
  • TI-2025-41253 ZITADEL Vulnerable to Unauthenticated Full-Read SSRF via V2 Login CVSS 3.1CRITICAL 9.3
  • TI-2025-39554 Zitadel Bypass Second Authentication Factor CVSS 4.0HIGH 8.7
  • TI-2024-33224 Zitadel User Registration Bypass Vulnerability CVSS 3.1HIGH 7.5
  • TI-2024-31388 Service Users Deactivation not Working in Zitadel CVSS 3.1HIGH 8.1
  • TI-2026-23310 ZITADEL: Bypassing Zitadel Login Behavior and Security Policy in Login V2 CVSS 3.1HIGH 8.2
See all 46 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences