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TI-2023-23905 Aliases CVE-2023-44399GHSA-v683-rcxx-vpff

ZITADEL's password reset does not respect the "Ignoring unknown usernames" setting

Priority LOW 31CWE-640Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-640.

Summary

ZITADEL provides identity infrastructure. In versions 2.37.2 and prior, ZITADEL administrators can enable a setting called "Ignoring unknown usernames" which helps mitigate attacks that try to guess/enumerate usernames. While this settings was properly working during the authentication process it did not work correctly on the password reset flow. This meant that even if this feature was active that an attacker could use the password reset function to verify if an account exist within ZITADEL. This bug has been patched in versions 2.37.3 and 2.38.0. No known workarounds are available.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00665 52nd percentileScored 2026-11-07
Fix Fixed zitadel (zitadel): 2.37.3github.com/zitadel/zitadel (Go): 2.37.3

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
zitadelzitadelbefore 2.37.32.37.3Patch availableCNA
—github.com/zitadel/zitadel (Go)before 2.37.32.37.3Patch availableGHSA-v683-rcxx-vpff
  • zitadel Vendorzitadel Affected before 2.37.3 Fixed in 2.37.3 Patch available CNA
  • github.com/zitadel/zitadel (Go) Vendor— Affected before 2.37.3 Fixed in 2.37.3 Patch available GHSA-v683-rcxx-vpff

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*up to 2.37.2Vulnerablezitadel
  • cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* Versions up to 2.37.2 Vulnerable ·zitadel

Remediation

  • Fix · CNA zitadel (zitadel) Fixed in 2.37.3
  • Fix · GHSA-v683-rcxx-vpff github.com/zitadel/zitadel (Go) Fixed in 2.37.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-44399
  2. 2026-10-03 Alias added: GHSA-v683-rcxx-vpff
  3. 2026-10-11 EPSS moved to the 50th–90th percentile

References

Advisory 2

Other 3

  • 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