CVE-2025-31124

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.

Affected Software

VendorProductVersion RangeStatus
zitadelzitadel>= 2.62.0, < 2.63.9affected
zitadelzitadel>= 2.64.0-rc.1, < 2.64.6affected
zitadelzitadel>= 2.65.0-rc.1, < 2.65.7affected
zitadelzitadel>= 2.66.0-rc.1, < 2.66.16affected
zitadelzitadel>= 2.67.0-rc.1, < 2.67.13affected
zitadelzitadel>= 2.68.0-rc.1, < 2.68.9affected
zitadelzitadel>= 2.69.0-rc.1, < 2.69.9affected
zitadelzitadel>= 2.70.0-rc.1, < 2.70.8affected
zitadelzitadel>= 2.71.0-rc.1, < 2.71.6affected

Weaknesses

  • CWE-203: CWE-203: Observable Discrepancy
  • CWE-204: CWE-204: Observable Response Discrepancy
  • CWE-200: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References